Buffer Polygon based on Ratser
I'm using Global mapper 20.1.
I have a polygon shape file along a river stretch (represents maximum flooding area) and a DEM (30m x 30m raster) reperesnting the eelvation in and around the area.
Now what I need is to extend that boundary-polygon or buffer it towards outside (from the riverline on both sides/banks) such that the new boundary polgon is away from earlier boundary polygon by 3meter increase in elevation (based on teh udnerlying DEM) - which means in vertical cliff both boundary line will be same, in high slope the new boundary line will be little further away and in flat slope it will be much furtehr away.
I hope I could make my task clearer. Hoping for the hints from the expert on how to get this done?
Thanking you all!