Help with ArcGis/Spatial Analyst. Anyone?
I need to work with ArcGis and have no idea what I am doing. I have gotten advice on other unlikey subjects here before, so.... If anyone feels like giving me a few pointers that would be really great.
I have DEMs of a glacier for different years and want to see how the volume changes for different elevation zones. what I would like to eventually have is tables from which i can see how much volume is lost between year a and year b in the area of the glacier from 2000m-2100m, 2100-2200m and so on.
I would like to cut the raster DEM files along the glacier boundaries. i have not been able to figure out a way to use the clip tool to cut the raster along the glacier boundary polygon...? it will only clip two polygons or rectangles out of a raster.
Using the minus tool on 2 DEMs produces a new raster of differences in elevation/volume. I am trying to use Zonal Statistics as table to look at the actual values. How do I create an input file defining the zones (say increments of 100m of elevation)?
Many thanks if someone can help!