Here is the 2nd Scenario of our 4 part lab for this week on Suitability Least Cost Analysis. This is a land suitability analysis to assist a property developer in determining best areas for development before the area becomes a conservation area or is restricted by other infrastructure pipeline projects. There were 5 criteria that I had to consider for this analysis: Land Cover, Soil Types, Terrain slope, Proximity to rivers, Proximity to roads. Each of the criterion influences development potential differently. To understand how these priorities would differ the land suitability outcomes, I ran two weighted overlays. The first overlay, shown on the left of the figure above, is an equal weighted scenario where all criteria were given equal importance. The second was a Slope Priority Weighting where emphasis was placed on slope because of its impact on construction feasibility.
I ran the Reclassify Tool in ArcGIS Pro to reclassify each input dataset into standardized suitability ratings on a scale from least to most suitable. Then, I combined these factors using the Weighted Overlay Tool for both weighting schemes.
The equal weight map displays a balanced distribution of suitability categories where all were given 20% priority. With the slope priority weighting map, you can see a shift in where there are steep slopes as it is giving priority to better terrain conditions for construction.
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