I have a spatial data set that shows areas of use (several different types of use) on the landscape. I am looking for ways to overlay these spatial use layers so that I can show where the areas of highest use (hotspot locations) as well as areas of moderate use and areas of lowest use. How can this be best achieved?
I have done something similar for possible habitats analysis.
- For each shapefile in the analysis (criteria types for habitats), I created a field (integer) called weighting and assigned it the value 1.
- Then I used the union tool to union all the layers.
- In the newly created union shapefile, I created a tally field and tallied up all the weighting fields to get a total weighting for that row.
- Based on the tally, the higher the number the more criteria for possible habitat, occupied the same area.
At the time, this was the only method I could think of but after reading Llaves comments, that's another method I will now try. Hope this is some use.