Hi All, Does anyone know is it possible to calculate the elevation above a river channel (actual river network that was digitised as opposed to being extracted from a DTM) from a DTM and create a polygon from it.
I need to calculate heights of 1m and 3m above a river channel on both sides of the channel and create a polygon from it. Thanks all. Le gach dea ghui, *Shane Carey* *GIS and Data Solutions Consultant*
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