National Center for Geographic Information and Analysis
Unit 38 - Digital Elevation Models
- Author(s): Unit 38, CC in GIS
- Klinkenberg, Brian
- Editor(s): Goodchild, Michael F.
- Kemp, Karen K.
- et al.
This unit considers digital elevation models (DEMs) as one way of representing surfaces. It describes how DEMs are created and used, particularly in hydrology. Approaches for estimating elevation, slope and aspect, and for determining drainage networks are presented, along with a discussion of issues that may arise when automatically determining drainage networks from DEMs.