How to find out the density or percentage of vegetation in each aspect

Question

I am trying to find out what is controlling vegetation in an area of Saudi Arabia for my masters project and I am currently focusing on the aspect of slopes in the area. I have a DEM layer and I have used the aspect tool to show me which direction the slopes are facing in. I also have a shapefile feature class of points of vegetation and wish to find out the proportion/percentage or density of this vegetation in each aspect (so how much of the vegetation is only on south facing slopes etc.) but I am struggling to find a way to do this. I have tried to do it with zonal statistics but I don't know how to get it to accept the different aspects as individual zones.

Does anyone have any ideas how I might go about this?

Answer 1

I'd use the 'Tabulate Area', creating a cross-reference table between reclassified Aspect to 1-8 or 1-16 classes, and vegetation type areas. The resulting table would have aspect class and vegetation association. Sorry for my english.

Answer 2

If you have the license you could use the Extract Values to Point tool to add the aspect raster value to your point layer and then carry on with whatever method you will use to run your density analysis.

Extracts the cell values of a raster based on a set of point features and records the values in the attribute table of an output feature class.