I have an sdc file with water bodies, i.e. oceans-rivers-lakes. I want to combine it with a shapefile with the boundaries of countries all over the world and produce two measures: 1) The average distance from waterways for each coutnry, and 2) the average fraction of land that is within e.g. 100km from water.
I work with ARC GIS 10.1.
Any suggestions on how to proceed?