{"id":444,"date":"2026-10-04T03:03:18","date_gmt":"2026-10-04T03:03:18","guid":{"rendered":"https:\/\/helpwithmygisassignment.com\/blog\/?p=444"},"modified":"2026-10-04T03:03:18","modified_gmt":"2026-10-04T03:03:18","slug":"multi-criteria-evaluation-gis-site-selection-2","status":"publish","type":"post","link":"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/","title":{"rendered":"Multi Criteria Evaluation GIS Site Selection: 7 Best Steps"},"content":{"rendered":"<p>&nbsp;<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Multi_Criteria_Evaluation_GIS_Site_Selection_A_Step-by-Step_Site_Suitability_Tutorial\" >Multi Criteria Evaluation GIS Site Selection: A Step-by-Step Site Suitability Tutorial<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Introduction_What_Is_Multi-Criteria_Evaluation_in_GIS\" >Introduction: What Is Multi-Criteria Evaluation in GIS?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#1_Understand_the_Structure_of_a_Site_Suitability_Model\" >1. Understand the Structure of a Site Suitability Model<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Factors\" >Factors<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Constraints\" >Constraints<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#2_Define_the_Decision_Problem\" >2. Define the Decision Problem<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#3_Establish_Your_Suitability_Criteria\" >3. Establish Your Suitability Criteria<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Do_not_choose_criteria_simply_because_the_datasets_are_available\" >Do not choose criteria simply because the datasets are available.<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#4_Establish_Buffer_Distance_Constraints\" >4. Establish Buffer Distance Constraints<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#5_Prepare_the_Input_Data\" >5. Prepare the Input Data<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#6_Use_a_Common_Projected_CRS\" >6. Use a Common Projected CRS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Check\" >Check:<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#7_Standardize_the_Criteria\" >7. Standardize the Criteria<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#8_Calculate_Euclidean_Distance\" >8. Calculate Euclidean Distance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#9_Decide_Whether_Nearer_or_Farther_Is_Better\" >9. Decide Whether Nearer or Farther Is Better<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Example_Road_Accessibility\" >Example: Road Accessibility<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Example_River_Separation\" >Example: River Separation<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#10_Calculate_Slope_From_the_DEM\" >10. Calculate Slope From the DEM<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#11_Reclassify_the_Criteria\" >11. Reclassify the Criteria<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Example\" >Example<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#12_Reclassify_Categorical_Land-Cover_Data\" >12. Reclassify Categorical Land-Cover Data<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#13_Build_the_Decision_Matrix\" >13. Build the Decision Matrix<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#14_Assign_Weights\" >14. Assign Weights<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#15_Where_Does_AHP_Fit_In\" >15. Where Does AHP Fit In?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Basic_AHP_workflow\" >Basic AHP workflow<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#16_Run_Weighted_Overlay\" >16. Run Weighted Overlay<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#17_Understand_the_Suitability_Output\" >17. Understand the Suitability Output<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#18_Apply_Constraints_Separately\" >18. Apply Constraints Separately<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#19_Handle_NoData_Carefully\" >19. Handle NoData Carefully<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Troubleshooting_workflow\" >Troubleshooting workflow<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#20_Resolving_Scale_Mismatch_Errors\" >20. Resolving Scale Mismatch Errors<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Solution\" >Solution<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#21_Check_Raster_Alignment\" >21. Check Raster Alignment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#22_Validate_the_Suitability_Model\" >22. Validate the Suitability Model<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Test_1_Inspect_high-suitability_areas\" >Test 1: Inspect high-suitability areas<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Test_2_Inspect_low-suitability_areas\" >Test 2: Inspect low-suitability areas<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Test_3_Check_known_locations\" >Test 3: Check known locations<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#23_Perform_Sensitivity_Analysis\" >23. Perform Sensitivity Analysis<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#24_Common_Troubleshooting_Problems\" >24. Common Troubleshooting Problems<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Problem_1_Weighted_Overlay_Rejects_a_Raster\" >Problem 1: Weighted Overlay Rejects a Raster<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-41\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Possible_cause\" >Possible cause<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-42\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Fix\" >Fix<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-43\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Problem_2_Large_Areas_Become_NoData\" >Problem 2: Large Areas Become NoData<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-44\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Possible_causes\" >Possible causes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-45\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Fix-2\" >Fix<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-46\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Problem_3_Almost_Everything_Is_Highly_Suitable\" >Problem 3: Almost Everything Is Highly Suitable<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-47\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Possible_causes-2\" >Possible causes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-48\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Fix-3\" >Fix<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-49\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Problem_4_Almost_Everything_Is_Unsuitable\" >Problem 4: Almost Everything Is Unsuitable<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-50\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Problem_5_The_Map_Looks_Correct_but_the_Analysis_Is_Wrong\" >Problem 5: The Map Looks Correct but the Analysis Is Wrong<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-51\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#25_Final_Suitability_Model_Workflow\" >25. Final Suitability Model Workflow<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-52\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#26_Quick_Quality-Control_Checklist\" >26. Quick Quality-Control Checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-53\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/#Final_Takeaway\" >Final Takeaway<\/a><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"Multi_Criteria_Evaluation_GIS_Site_Selection_A_Step-by-Step_Site_Suitability_Tutorial\"><\/span>Multi Criteria Evaluation GIS Site Selection: A Step-by-Step Site Suitability Tutorial<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"Introduction_What_Is_Multi-Criteria_Evaluation_in_GIS\"><\/span>Introduction: What Is Multi-Criteria Evaluation in GIS?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Multi criteria evaluation GIS site selection<\/strong> is a spatial decision-making approach used to identify locations that best satisfy several criteria at the same time.<\/p>\n<p>A typical site-selection problem might ask:<\/p>\n<blockquote><p>Where should a new hospital, school, warehouse, solar farm, landfill, or emergency facility be located?<\/p><\/blockquote>\n<p>The answer rarely depends on a single geographic variable. A suitable site may need to:<\/p>\n<ul>\n<li>Be close to roads.<\/li>\n<li>Have gentle slopes.<\/li>\n<li>Avoid rivers and flood-prone areas.<\/li>\n<li>Be located on appropriate land cover.<\/li>\n<li>Remain a certain distance from settlements.<\/li>\n<li>Have sufficient available land.<\/li>\n<\/ul>\n<p><strong>Multi-Criteria Evaluation (MCE)<\/strong> combines these factors into a single suitability model. A common approach is <strong>weighted overlay analysis<\/strong>, where each criterion is standardized to a common suitability scale and then assigned a weight according to its relative importance.<\/p>\n<p>The basic concept is:<\/p>\n<blockquote><p><strong>Raw spatial data \u2192 standardized suitability scores \u2192 weighted combination \u2192 suitability map \u2192 validation<\/strong><\/p><\/blockquote>\n<p>This workflow is widely used in <a href=\"https:\/\/helpwithmygisassignment.com\/blog\/gis-in-urban-planning\/\">GIS planning,<\/a> environmental assessment, urban planning, infrastructure development, agriculture, and renewable-energy site selection.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-590 size-large\" src=\"https:\/\/helpwithmygisassignment.com\/blog\/wp-content\/uploads\/2026\/10\/watermarked_img_9647732299724742576-1024x709.jpg\" alt=\"Flowchart and spatial analysis diagram for Multi Criteria Evaluation GIS Site Selection showing input factors, standardization, weighted overlay, and final suitability map\" width=\"1024\" height=\"709\" srcset=\"https:\/\/helpwithmygisassignment.com\/blog\/wp-content\/uploads\/2026\/10\/watermarked_img_9647732299724742576-1024x709.jpg 1024w, https:\/\/helpwithmygisassignment.com\/blog\/wp-content\/uploads\/2026\/10\/watermarked_img_9647732299724742576-300x208.jpg 300w, https:\/\/helpwithmygisassignment.com\/blog\/wp-content\/uploads\/2026\/10\/watermarked_img_9647732299724742576-768x532.jpg 768w, https:\/\/helpwithmygisassignment.com\/blog\/wp-content\/uploads\/2026\/10\/watermarked_img_9647732299724742576.jpg 1247w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"1_Understand_the_Structure_of_a_Site_Suitability_Model\"><\/span>1. Understand the Structure of a Site Suitability Model<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Before opening <a href=\"https:\/\/pro.arcgis.com\" target=\"_blank\" rel=\"noopener\">ArcGIS Pro<\/a> or QGIS, separate your criteria into two categories:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Factors\"><\/span>Factors<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A <strong>factor<\/strong> contributes positively or negatively to suitability on a continuous scale.<\/p>\n<p>Examples:<\/p>\n<ul>\n<li>Distance from roads<\/li>\n<li>Slope<\/li>\n<li>Distance from rivers<\/li>\n<li>Distance from settlements<\/li>\n<li>Elevation<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Constraints\"><\/span>Constraints<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A <strong>constraint<\/strong> identifies areas that should not be considered at all.<\/p>\n<p>Examples:<\/p>\n<ul>\n<li>Protected areas<\/li>\n<li>Existing buildings<\/li>\n<li>Water bodies<\/li>\n<li>Airports<\/li>\n<li>Legally restricted zones<\/li>\n<li>Floodways<\/li>\n<\/ul>\n<p>This distinction is important.<\/p>\n<p>A factor might say:<\/p>\n<blockquote><p>&#8220;Closer to a road is generally more suitable.&#8221;<\/p><\/blockquote>\n<p>A constraint says:<\/p>\n<blockquote><p>&#8220;This area cannot be used regardless of its other characteristics.&#8221;<\/p><\/blockquote>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"2_Define_the_Decision_Problem\"><\/span>2. Define the Decision Problem<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Start by writing a precise statement of the problem.<\/p>\n<p>For example:<\/p>\n<blockquote><p><strong>Objective:<\/strong> Identify suitable locations for a new community health facility.<\/p><\/blockquote>\n<p>Then establish the geographic study area.<\/p>\n<p>For example:<\/p>\n<ul>\n<li>One municipality<\/li>\n<li>A county<\/li>\n<li>A watershed<\/li>\n<li>An urban district<\/li>\n<li>A regional planning zone<\/li>\n<\/ul>\n<p>Define the study area before processing the criteria so that all datasets are analyzed over the same geographic extent.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"3_Establish_Your_Suitability_Criteria\"><\/span>3. Establish Your Suitability Criteria<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>For a simple student project, you might select:<\/p>\n<ol>\n<li>Distance to roads<\/li>\n<li>Slope<\/li>\n<li>Land cover<\/li>\n<li>Distance from rivers<\/li>\n<li>Distance from settlements<\/li>\n<\/ol>\n<p>However, the criteria should be justified by the actual planning problem.<\/p>\n<p>For a hospital, road accessibility might be highly important.<\/p>\n<p>For a solar farm, slope and solar-resource conditions might receive greater attention.<\/p>\n<p>For a landfill, distance from settlements and environmentally sensitive areas may be critical.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Do_not_choose_criteria_simply_because_the_datasets_are_available\"><\/span>Do not choose criteria simply because the datasets are available.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Every criterion should answer:<\/p>\n<blockquote><p><strong>Why should this variable influence site suitability?<\/strong><\/p><\/blockquote>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"4_Establish_Buffer_Distance_Constraints\"><\/span>4. Establish Buffer Distance Constraints<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Some suitability problems require minimum separation distances.<\/p>\n<p>For example, you may decide that candidate sites must be:<\/p>\n<ul>\n<li>At least 100 m from rivers.<\/li>\n<li>At least 500 m from major settlements.<\/li>\n<li>Within 2 km of roads.<\/li>\n<li>Outside protected areas.<\/li>\n<\/ul>\n<p>These distances should ideally come from:<\/p>\n<ul>\n<li>Planning regulations<\/li>\n<li>Environmental guidelines<\/li>\n<li>Engineering requirements<\/li>\n<li>Published literature<\/li>\n<li>The project&#8217;s stated assumptions<\/li>\n<\/ul>\n<p>If you are completing a university assignment and no official threshold is provided, clearly label your distances as <strong>project assumptions<\/strong> rather than presenting them as universal standards.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"5_Prepare_the_Input_Data\"><\/span>5. Prepare the Input Data<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Collect the required GIS layers.<\/p>\n<p>A typical project might contain:<\/p>\n<table>\n<thead>\n<tr>\n<th>Dataset<\/th>\n<th>Geometry<\/th>\n<th>Possible Use<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Roads<\/td>\n<td>Line<\/td>\n<td>Accessibility<\/td>\n<\/tr>\n<tr>\n<td>Rivers<\/td>\n<td>Line<\/td>\n<td>Environmental constraint<\/td>\n<\/tr>\n<tr>\n<td>Settlements<\/td>\n<td>Point\/Polygon<\/td>\n<td>Population access or exclusion<\/td>\n<\/tr>\n<tr>\n<td>Land cover<\/td>\n<td>Raster<\/td>\n<td>Land-use suitability<\/td>\n<\/tr>\n<tr>\n<td>DEM<\/td>\n<td>Raster<\/td>\n<td>Slope<\/td>\n<\/tr>\n<tr>\n<td>Protected areas<\/td>\n<td>Polygon<\/td>\n<td>Constraint<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Before analysis, inspect every dataset.<\/p>\n<p>Check:<\/p>\n<ul>\n<li>CRS<\/li>\n<li>Extent<\/li>\n<li>Resolution<\/li>\n<li>Units<\/li>\n<li>Geometry<\/li>\n<li>Missing values<\/li>\n<li>Attribute fields<\/li>\n<\/ul>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"6_Use_a_Common_Projected_CRS\"><\/span>6. Use a Common Projected CRS<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Distance-based analysis should generally be performed using a projected coordinate system whose units are appropriate for the study area.<\/p>\n<p>For example, if your distance raster is measured in meters, your analysis should not accidentally be based on geographic coordinates measured in degrees.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Check\"><\/span>Check:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<blockquote><p>Is my coordinate system appropriate for measuring distance and area?<\/p><\/blockquote>\n<p>This is one of the most important preprocessing steps in a suitability model.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"7_Standardize_the_Criteria\"><\/span>7. Standardize the Criteria<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>The original datasets usually use completely different units.<\/p>\n<p>For example:<\/p>\n<table>\n<thead>\n<tr>\n<th>Criterion<\/th>\n<th>Original Unit<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Distance to road<\/td>\n<td>meters<\/td>\n<\/tr>\n<tr>\n<td>Slope<\/td>\n<td>degrees<\/td>\n<\/tr>\n<tr>\n<td>Land cover<\/td>\n<td>category codes<\/td>\n<\/tr>\n<tr>\n<td>Distance to river<\/td>\n<td>meters<\/td>\n<\/tr>\n<tr>\n<td>Elevation<\/td>\n<td>meters<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>You cannot meaningfully add these raw values together.<\/p>\n<p>Therefore, you must convert them to a <strong>common suitability scale<\/strong>.<\/p>\n<p>A common student workflow is:<\/p>\n<p><strong>1 = unsuitable<\/strong><\/p>\n<p>through<\/p>\n<p><strong>5 = highly suitable<\/strong><\/p>\n<p>or:<\/p>\n<p><strong>0 = unsuitable<\/strong><\/p>\n<p>through<\/p>\n<p><strong>100 = highly suitable<\/strong><\/p>\n<p>The important requirement is consistency.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"8_Calculate_Euclidean_Distance\"><\/span>8. Calculate Euclidean Distance<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>For criteria involving proximity, create a distance raster.<\/p>\n<p>Typical examples include:<\/p>\n<ul>\n<li>Distance to roads<\/li>\n<li>Distance to rivers<\/li>\n<li>Distance to settlements<\/li>\n<li>Distance to hospitals<\/li>\n<li>Distance to schools<\/li>\n<\/ul>\n<p>In ArcGIS Pro, a common workflow is:<\/p>\n<p><strong>Spatial Analyst \u2192 Distance \u2192 Euclidean Distance<\/strong><\/p>\n<p>Select the relevant feature layer and specify the output raster.<\/p>\n<p>[Insert Screenshot of Euclidean Distance Tool]<\/p>\n<p>The resulting raster assigns each cell a distance to the nearest input feature.<\/p>\n<p>For example:<\/p>\n<table>\n<thead>\n<tr>\n<th>Cell<\/th>\n<th align=\"right\">Distance to Road<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>A<\/td>\n<td align=\"right\">50 m<\/td>\n<\/tr>\n<tr>\n<td>B<\/td>\n<td align=\"right\">250 m<\/td>\n<\/tr>\n<tr>\n<td>C<\/td>\n<td align=\"right\">750 m<\/td>\n<\/tr>\n<tr>\n<td>D<\/td>\n<td align=\"right\">2,000 m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"9_Decide_Whether_Nearer_or_Farther_Is_Better\"><\/span>9. Decide Whether Nearer or Farther Is Better<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>This is where the planning logic becomes important.<\/p>\n<p>For road accessibility:<\/p>\n<blockquote><p><strong>Closer = more suitable<\/strong><\/p><\/blockquote>\n<p>For avoiding pollution sources:<\/p>\n<blockquote><p><strong>Farther = more suitable<\/strong><\/p><\/blockquote>\n<p>For distance from rivers in a flood-sensitive project:<\/p>\n<blockquote><p><strong>Farther = potentially more suitable<\/strong><\/p><\/blockquote>\n<p>Therefore, do not blindly reclassify every distance raster in the same direction.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Example_Road_Accessibility\"><\/span>Example: Road Accessibility<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<thead>\n<tr>\n<th align=\"right\">Distance<\/th>\n<th align=\"right\">Suitability<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"right\">0\u2013250 m<\/td>\n<td align=\"right\">5<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">250\u2013500 m<\/td>\n<td align=\"right\">4<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">500\u20131,000 m<\/td>\n<td align=\"right\">3<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">1,000\u20132,000 m<\/td>\n<td align=\"right\">2<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">&gt;2,000 m<\/td>\n<td align=\"right\">1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"Example_River_Separation\"><\/span>Example: River Separation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<thead>\n<tr>\n<th align=\"right\">Distance<\/th>\n<th align=\"right\">Suitability<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"right\">&lt;100 m<\/td>\n<td align=\"right\">1<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">100\u2013250 m<\/td>\n<td align=\"right\">2<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">250\u2013500 m<\/td>\n<td align=\"right\">3<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">500\u20131,000 m<\/td>\n<td align=\"right\">4<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">&gt;1,000 m<\/td>\n<td align=\"right\">5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The same distance concept can therefore produce opposite suitability relationships depending on the planning objective.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"10_Calculate_Slope_From_the_DEM\"><\/span>10. Calculate Slope From the DEM<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Slope is commonly derived from a Digital Elevation Model.<\/p>\n<p>In ArcGIS Pro:<\/p>\n<p><strong>Spatial Analyst \u2192 Surface \u2192 Slope<\/strong><\/p>\n<p>Specify:<\/p>\n<ul>\n<li>Input DEM<\/li>\n<li>Output measurement<\/li>\n<li>Z factor if required<\/li>\n<\/ul>\n<p>[Insert Screenshot of Slope Tool]<\/p>\n<p>The output might look like:<\/p>\n<table>\n<thead>\n<tr>\n<th align=\"right\">Slope<\/th>\n<th align=\"right\">Suitability<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"right\">0\u20135\u00b0<\/td>\n<td align=\"right\">5<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">5\u201310\u00b0<\/td>\n<td align=\"right\">4<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">10\u201315\u00b0<\/td>\n<td align=\"right\">3<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">15\u201325\u00b0<\/td>\n<td align=\"right\">2<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">&gt;25\u00b0<\/td>\n<td align=\"right\">1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>These thresholds are examples only. Your project should justify its actual slope thresholds.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"11_Reclassify_the_Criteria\"><\/span>11. Reclassify the Criteria<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Once the factor rasters have been created, convert them into the common suitability scale.<\/p>\n<p>In ArcGIS Pro, use:<\/p>\n<p><strong>Spatial Analyst \u2192 Reclass \u2192 Reclassify<\/strong><\/p>\n<p>[Insert Screenshot of Reclassify Tool]<\/p>\n<p>For example, suppose the original slope raster contains:<\/p>\n<ul>\n<li>0\u20135\u00b0<\/li>\n<li>5\u201310\u00b0<\/li>\n<li>10\u201315\u00b0<\/li>\n<li>15\u201325\u00b0<\/li>\n<li>\n<blockquote><p>25\u00b0<\/p><\/blockquote>\n<\/li>\n<\/ul>\n<p>You can assign:<\/p>\n<ul>\n<li>5 = highly suitable<\/li>\n<li>4 = suitable<\/li>\n<li>3 = moderate<\/li>\n<li>2 = low<\/li>\n<li>1 = unsuitable<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Example\"><\/span>Example<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<thead>\n<tr>\n<th align=\"right\">Original Slope<\/th>\n<th align=\"right\">New Suitability<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"right\">0\u20135\u00b0<\/td>\n<td align=\"right\">5<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">5\u201310\u00b0<\/td>\n<td align=\"right\">4<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">10\u201315\u00b0<\/td>\n<td align=\"right\">3<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">15\u201325\u00b0<\/td>\n<td align=\"right\">2<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">&gt;25\u00b0<\/td>\n<td align=\"right\">1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Repeat this process for every factor.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"12_Reclassify_Categorical_Land-Cover_Data\"><\/span>12. Reclassify Categorical Land-Cover Data<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Land cover is different from distance and slope because its values represent categories rather than continuous measurements.<\/p>\n<p>For example:<\/p>\n<table>\n<thead>\n<tr>\n<th>Land Cover<\/th>\n<th align=\"right\">Suitability<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Built-up<\/td>\n<td align=\"right\">1<\/td>\n<\/tr>\n<tr>\n<td>Dense forest<\/td>\n<td align=\"right\">2<\/td>\n<\/tr>\n<tr>\n<td>Agricultural land<\/td>\n<td align=\"right\">3<\/td>\n<\/tr>\n<tr>\n<td>Grassland<\/td>\n<td align=\"right\">4<\/td>\n<\/tr>\n<tr>\n<td>Bare land<\/td>\n<td align=\"right\">5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The actual suitability assignments depend entirely on the project objective.<\/p>\n<p>For a conservation project, the same land-cover categories could receive very different scores.<\/p>\n<p>This is why your reclassification table should be explained in the methodology.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"13_Build_the_Decision_Matrix\"><\/span>13. Build the Decision Matrix<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Before assigning weights in the GIS software, create a decision matrix.<\/p>\n<p>Here is an example for a hypothetical community health-facility site-selection project:<\/p>\n<table>\n<thead>\n<tr>\n<th>Criterion<\/th>\n<th>Standardization Range<\/th>\n<th align=\"right\">Percentage Weight<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Distance to roads<\/td>\n<td>1\u20135; closer = better<\/td>\n<td align=\"right\">30%<\/td>\n<\/tr>\n<tr>\n<td>Slope<\/td>\n<td>1\u20135; flatter = better<\/td>\n<td align=\"right\">25%<\/td>\n<\/tr>\n<tr>\n<td>Land cover<\/td>\n<td>1\u20135; preferred classes = higher<\/td>\n<td align=\"right\">20%<\/td>\n<\/tr>\n<tr>\n<td>Distance from rivers<\/td>\n<td>1\u20135; farther = better<\/td>\n<td align=\"right\">15%<\/td>\n<\/tr>\n<tr>\n<td>Distance from settlements<\/td>\n<td>1\u20135; project-dependent<\/td>\n<td align=\"right\">10%<\/td>\n<\/tr>\n<tr>\n<td><strong>Total<\/strong><\/td>\n<td>\u2014<\/td>\n<td align=\"right\"><strong>100%<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The weights must sum to:<\/p>\n<p><strong>100%<\/strong><\/p>\n<p>This table should appear in your project report because it makes the decision process transparent.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"14_Assign_Weights\"><\/span>14. Assign Weights<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Not every criterion should necessarily have equal importance.<\/p>\n<p>For example:<\/p>\n<ul>\n<li>Road access \u2192 30%<\/li>\n<li>Slope \u2192 25%<\/li>\n<li>Land cover \u2192 20%<\/li>\n<li>River separation \u2192 15%<\/li>\n<li>Settlement proximity \u2192 10%<\/li>\n<\/ul>\n<p>The weighted model can be represented conceptually as:<\/p>\n<p><strong>Suitability = (Road \u00d7 0.30) + (Slope \u00d7 0.25) + (Land Cover \u00d7 0.20) + (River \u00d7 0.15) + (Settlement \u00d7 0.10)<\/strong><\/p>\n<p>Every input is now on the same suitability scale, allowing the weighted combination to be calculated.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"15_Where_Does_AHP_Fit_In\"><\/span>15. Where Does AHP Fit In?<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>The <strong>Analytic Hierarchy Process (AHP)<\/strong> is a structured method for deriving weights from pairwise comparisons between criteria.<\/p>\n<p>Instead of simply saying:<\/p>\n<blockquote><p>Roads = 30%<\/p><\/blockquote>\n<p>you compare criteria against one another.<\/p>\n<p>For example:<\/p>\n<blockquote><p>Is road accessibility more important than slope?<\/p><\/blockquote>\n<p>Then:<\/p>\n<blockquote><p>How much more important?<\/p><\/blockquote>\n<p>The comparisons are organized in a pairwise comparison matrix.<\/p>\n<p>AHP is particularly useful when your project requires a more formal justification of the weights.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Basic_AHP_workflow\"><\/span>Basic AHP workflow<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li>Define the objective.<\/li>\n<li>List the criteria.<\/li>\n<li>Compare criteria pairwise.<\/li>\n<li>Assign relative importance scores.<\/li>\n<li>Calculate normalized weights.<\/li>\n<li>Check consistency.<\/li>\n<li>Use the resulting weights in the suitability model.<\/li>\n<\/ol>\n<p>AHP therefore helps answer:<\/p>\n<blockquote><p><strong>How should the criteria be weighted?<\/strong><\/p><\/blockquote>\n<p>Weighted Overlay answers:<\/p>\n<blockquote><p><strong>How should the standardized criteria be combined?<\/strong><\/p><\/blockquote>\n<p>They can be used together.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"16_Run_Weighted_Overlay\"><\/span>16. Run Weighted Overlay<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>After standardization and weighting, combine the factor rasters.<\/p>\n<p>In ArcGIS Pro, a common tool is:<\/p>\n<p><strong>Spatial Analyst \u2192 Overlay \u2192 Weighted Overlay<\/strong><\/p>\n<p>Add the standardized rasters to the table.<\/p>\n<p>[Insert Screenshot of Weighted Overlay Table]<\/p>\n<p>Your table may look conceptually like:<\/p>\n<table>\n<thead>\n<tr>\n<th>Input Raster<\/th>\n<th>Field<\/th>\n<th>Scale<\/th>\n<th align=\"right\">Weight<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Road suitability<\/td>\n<td>Suitability<\/td>\n<td>1\u20135<\/td>\n<td align=\"right\">30%<\/td>\n<\/tr>\n<tr>\n<td>Slope suitability<\/td>\n<td>Suitability<\/td>\n<td>1\u20135<\/td>\n<td align=\"right\">25%<\/td>\n<\/tr>\n<tr>\n<td>Land-cover suitability<\/td>\n<td>Suitability<\/td>\n<td>1\u20135<\/td>\n<td align=\"right\">20%<\/td>\n<\/tr>\n<tr>\n<td>River suitability<\/td>\n<td>Suitability<\/td>\n<td>1\u20135<\/td>\n<td align=\"right\">15%<\/td>\n<\/tr>\n<tr>\n<td>Settlement suitability<\/td>\n<td>Suitability<\/td>\n<td>1\u20135<\/td>\n<td align=\"right\">10%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Confirm that the weights sum to <strong>100%<\/strong>.<\/p>\n<p>Then run the tool.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"17_Understand_the_Suitability_Output\"><\/span>17. Understand the Suitability Output<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>The resulting raster represents the combined suitability score.<\/p>\n<p>Depending on your scale, higher values may represent better sites.<\/p>\n<p>For example:<\/p>\n<table>\n<thead>\n<tr>\n<th align=\"right\">Final Score<\/th>\n<th>Interpretation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"right\">1<\/td>\n<td>Very low suitability<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">2<\/td>\n<td>Low suitability<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">3<\/td>\n<td>Moderate suitability<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">4<\/td>\n<td>High suitability<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">5<\/td>\n<td>Very high suitability<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>You can then symbolize the result using a sequential color ramp.<\/p>\n<p>[Insert Screenshot of Final Suitability Raster]<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"18_Apply_Constraints_Separately\"><\/span>18. Apply Constraints Separately<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Remember that a constraint is different from a factor.<\/p>\n<p>Suppose protected areas are completely unavailable.<\/p>\n<p>A high suitability score should not allow a protected area to become a candidate site simply because it is close to roads and has a favorable slope.<\/p>\n<p>Create a binary constraint mask:<\/p>\n<ul>\n<li><strong>1 = allowed<\/strong><\/li>\n<li><strong>0 = prohibited<\/strong><\/li>\n<\/ul>\n<p>Then combine the suitability result with the constraint.<\/p>\n<p>Conceptually:<\/p>\n<p><strong>Final suitability = Weighted suitability \u00d7 Constraint mask<\/strong><\/p>\n<p>This forces prohibited areas to become unsuitable.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"19_Handle_NoData_Carefully\"><\/span>19. Handle NoData Carefully<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p><strong>NoData<\/strong> cells can create unexpected gaps in your suitability map.<\/p>\n<p>Potential causes include:<\/p>\n<ul>\n<li>Different raster extents<\/li>\n<li>Different cell sizes<\/li>\n<li>Missing source data<\/li>\n<li>Masking<\/li>\n<li>Reclassification settings<\/li>\n<li>Areas outside the input dataset<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Troubleshooting_workflow\"><\/span>Troubleshooting workflow<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Check:<\/p>\n<ul>\n<li>Cell size<\/li>\n<li>Processing extent<\/li>\n<li>Snap Raster<\/li>\n<li>Coordinate system<\/li>\n<li>Raster alignment<\/li>\n<li>NoData settings<\/li>\n<\/ul>\n<p>In ArcGIS Pro, environment settings are especially important.<\/p>\n<p>Set a common:<\/p>\n<ul>\n<li>Processing Extent<\/li>\n<li>Cell Size<\/li>\n<li>Snap Raster<\/li>\n<li>Output Coordinate System<\/li>\n<\/ul>\n<p>This ensures that the input rasters line up correctly.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"20_Resolving_Scale_Mismatch_Errors\"><\/span>20. Resolving Scale Mismatch Errors<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>A common problem occurs when one raster uses:<\/p>\n<p><strong>1\u20135<\/strong><\/p>\n<p>while another uses:<\/p>\n<p><strong>1\u201310<\/strong><\/p>\n<p>and another uses:<\/p>\n<p><strong>0\u2013100<\/strong><\/p>\n<p>These datasets should not simply be combined without standardization.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Solution\"><\/span>Solution<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Choose a common scale, such as:<\/p>\n<p><strong>1\u20135<\/strong><\/p>\n<p>Then reclassify every factor to that scale.<\/p>\n<p>For example:<\/p>\n<table>\n<thead>\n<tr>\n<th align=\"right\">Original<\/th>\n<th align=\"right\">Standardized<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"right\">0\u201320<\/td>\n<td align=\"right\">1<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">21\u201340<\/td>\n<td align=\"right\">2<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">41\u201360<\/td>\n<td align=\"right\">3<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">61\u201380<\/td>\n<td align=\"right\">4<\/td>\n<\/tr>\n<tr>\n<td align=\"right\">81\u2013100<\/td>\n<td align=\"right\">5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The important thing is that <strong>5 always means the same relative level of suitability<\/strong> across the model.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"21_Check_Raster_Alignment\"><\/span>21. Check Raster Alignment<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Two rasters may appear to have the same geographic coverage while having different cell grids.<\/p>\n<p>Check:<\/p>\n<ul>\n<li>Pixel size<\/li>\n<li>Extent<\/li>\n<li>Origin<\/li>\n<li>Projection<\/li>\n<li>Number of rows and columns<\/li>\n<\/ul>\n<p>Use a common <strong>snap raster<\/strong> so cell boundaries align.<\/p>\n<p>This matters because a weighted overlay is performed cell by cell.<\/p>\n<p>If the grids are misaligned, apparently corresponding cells may not represent exactly the same geographic location.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"22_Validate_the_Suitability_Model\"><\/span>22. Validate the Suitability Model<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Do not stop after producing a colorful suitability map.<\/p>\n<p>A suitability model is a <strong>decision-support model<\/strong>, not automatically a prediction of where development should occur.<\/p>\n<p>Validation should therefore ask whether the model behaves logically.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Test_1_Inspect_high-suitability_areas\"><\/span>Test 1: Inspect high-suitability areas<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ask:<\/p>\n<ul>\n<li>Are they actually accessible?<\/li>\n<li>Do they avoid prohibited areas?<\/li>\n<li>Are the slopes reasonable?<\/li>\n<li>Do they satisfy the project&#8217;s constraints?<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Test_2_Inspect_low-suitability_areas\"><\/span>Test 2: Inspect low-suitability areas<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ask:<\/p>\n<ul>\n<li>Why were they classified as unsuitable?<\/li>\n<li>Is the result caused by one criterion or several?<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Test_3_Check_known_locations\"><\/span>Test 3: Check known locations<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If existing facilities or known suitable sites are available, compare them with the model output.<\/p>\n<p>This is not proof that the model is correct, but it can reveal obvious inconsistencies.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"23_Perform_Sensitivity_Analysis\"><\/span>23. Perform Sensitivity Analysis<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Weights contain assumptions.<\/p>\n<p>Suppose your initial model uses:<\/p>\n<p><strong>Road access = 30%<\/strong><\/p>\n<p>Try another scenario:<\/p>\n<p><strong>Road access = 20%<\/strong><\/p>\n<p>and increase another criterion accordingly.<\/p>\n<p>Then compare the resulting suitability maps.<\/p>\n<p>If the high-suitability areas remain broadly similar, the model may be relatively stable.<\/p>\n<p>If they change dramatically, the results are sensitive to the weighting assumptions.<\/p>\n<p>This is valuable information to report.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"24_Common_Troubleshooting_Problems\"><\/span>24. Common Troubleshooting Problems<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"Problem_1_Weighted_Overlay_Rejects_a_Raster\"><\/span>Problem 1: Weighted Overlay Rejects a Raster<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Possible_cause\"><\/span>Possible cause<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The raster does not meet the expected scale or data requirements.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Fix\"><\/span>Fix<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Check:<\/p>\n<ul>\n<li>Raster data type<\/li>\n<li>Reclassification<\/li>\n<li>Suitability scale<\/li>\n<li>Cell size<\/li>\n<li>Coordinate system<\/li>\n<\/ul>\n<p>Make sure all factor rasters use the intended standardized scale.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Problem_2_Large_Areas_Become_NoData\"><\/span>Problem 2: Large Areas Become NoData<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Possible_causes\"><\/span>Possible causes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Different raster extents<\/li>\n<li>Missing source data<\/li>\n<li>Incorrect mask<\/li>\n<li>NoData propagation<\/li>\n<li>Misconfigured processing environments<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Fix-2\"><\/span>Fix<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Compare the input rasters and standardize:<\/p>\n<ul>\n<li>Extent<\/li>\n<li>Cell size<\/li>\n<li>Snap Raster<\/li>\n<li>CRS<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Problem_3_Almost_Everything_Is_Highly_Suitable\"><\/span>Problem 3: Almost Everything Is Highly Suitable<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Possible_causes-2\"><\/span>Possible causes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Weak criteria<\/li>\n<li>Poorly differentiated reclassification<\/li>\n<li>Excessive weighting of one factor<\/li>\n<li>Suitability thresholds that are too generous<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Fix-3\"><\/span>Fix<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Inspect each criterion individually.<\/p>\n<p>Ask:<\/p>\n<blockquote><p>Does this input raster actually distinguish between suitable and unsuitable areas?<\/p><\/blockquote>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Problem_4_Almost_Everything_Is_Unsuitable\"><\/span>Problem 4: Almost Everything Is Unsuitable<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Check whether:<\/p>\n<ul>\n<li>One criterion is overly restrictive.<\/li>\n<li>A constraint was accidentally applied to the entire study area.<\/li>\n<li>Reclassification values were reversed.<\/li>\n<li>NoData has been propagated.<\/li>\n<li>Weights or scales were entered incorrectly.<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Problem_5_The_Map_Looks_Correct_but_the_Analysis_Is_Wrong\"><\/span>Problem 5: The Map Looks Correct but the Analysis Is Wrong<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>This is particularly dangerous because cartographic appearance does not prove analytical correctness.<\/p>\n<p>Always inspect the underlying raster values.<\/p>\n<p>Use:<\/p>\n<ul>\n<li>Identify<\/li>\n<li>Raster statistics<\/li>\n<li>Histograms<\/li>\n<li>Attribute tables where applicable<\/li>\n<li>Sample locations<\/li>\n<\/ul>\n<p>Do not validate a suitability model solely by looking at its colors.<\/p>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"25_Final_Suitability_Model_Workflow\"><\/span>25. Final Suitability Model Workflow<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>A defensible <strong>site suitability model<\/strong> can follow this sequence:<\/p>\n<pre><code class=\"language-text\">Define planning objective\r\n          \u2193\r\nSelect criteria\r\n          \u2193\r\nIdentify constraints\r\n          \u2193\r\nCollect spatial datasets\r\n          \u2193\r\nStandardize CRS and raster environment\r\n          \u2193\r\nCreate distance\/slope\/other factor rasters\r\n          \u2193\r\nReclassify factors to common suitability scale\r\n          \u2193\r\nDetermine criterion weights\r\n          \u2193\r\nApply AHP if formal weighting is required\r\n          \u2193\r\nRun Weighted Overlay\r\n          \u2193\r\nApply hard constraints\r\n          \u2193\r\nInspect suitability output\r\n          \u2193\r\nValidate results\r\n          \u2193\r\nPerform sensitivity analysis\r\n          \u2193\r\nProduce final suitability map<\/code><\/pre>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"26_Quick_Quality-Control_Checklist\"><\/span>26. Quick Quality-Control Checklist<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Before submitting your spatial decision-making project, check:<\/p>\n<ul class=\"contains-task-list\">\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Is the planning objective clearly defined?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Is every criterion theoretically justified?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Are factors separated from hard constraints?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Are all distance calculations performed in an appropriate projected CRS?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Are raster cell sizes consistent?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Is a common snap raster used?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Are all criteria standardized to the same suitability scale?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Are reclassification directions correct?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Do the weights sum to 100%?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Are AHP weights justified if AHP is used?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Have NoData areas been checked?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Have prohibited areas been masked?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Have high-suitability locations been inspected?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Have sensitivity tests been performed?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Are the assumptions documented?<\/li>\n<li class=\"task-list-item\"><input disabled=\"disabled\" type=\"checkbox\" \/> Does the final map clearly distinguish suitability classes?<\/li>\n<\/ul>\n<hr \/>\n<h1><span class=\"ez-toc-section\" id=\"Final_Takeaway\"><\/span>Final Takeaway<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>A strong <strong>multi criteria evaluation GIS site selection<\/strong> project is more than running a Weighted Overlay tool and producing a colorful raster.<\/p>\n<p>The quality of the result depends on the entire chain:<\/p>\n<p><strong>criteria selection \u2192 spatial preprocessing \u2192 standardization \u2192 weighting \u2192 overlay \u2192 constraints \u2192 validation<\/strong><\/p>\n<p>The most important principle is that every modeling decision should be defensible.<\/p>\n<p>If a student assigns <strong>30% to road proximity<\/strong>, they should be able to explain why. If a slope of <strong>0\u20135\u00b0 receives a suitability score of 5<\/strong>, they should explain the planning assumption behind that threshold. If protected areas are excluded, the source or project requirement for that constraint should be documented.<\/p>\n<p>A technically sophisticated model with poorly justified assumptions is still a weak decision model.<\/p>\n<p>A well-documented MCE workflow, on the other hand, allows another GIS analyst\u2014or your lecturer\u2014to understand exactly <strong>how the final suitability map was produced and why each decision was made<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Multi Criteria Evaluation GIS Site Selection: A Step-by-Step Site Suitability Tutorial Introduction: What Is Multi-Criteria Evaluation in GIS? Multi criteria evaluation GIS site selection is a spatial decision-making approach used to identify locations that best satisfy several criteria at the same time. A typical site-selection problem might ask: Where should a new hospital, school, &#8230; <a title=\"Multi Criteria Evaluation GIS Site Selection: 7 Best Steps\" class=\"read-more\" href=\"https:\/\/helpwithmygisassignment.com\/blog\/multi-criteria-evaluation-gis-site-selection-2\/\" aria-label=\"Read more about Multi Criteria Evaluation GIS Site Selection: 7 Best Steps\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":590,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-444","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gis-articles"],"_links":{"self":[{"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/posts\/444","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/comments?post=444"}],"version-history":[{"count":4,"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/posts\/444\/revisions"}],"predecessor-version":[{"id":591,"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/posts\/444\/revisions\/591"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/media\/590"}],"wp:attachment":[{"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/media?parent=444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/categories?post=444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/helpwithmygisassignment.com\/blog\/wp-json\/wp\/v2\/tags?post=444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}