assisted the Department of Basic Education to identify remote rural
schools for a teacher incentive scheme. There were two components to
this: categorising towns by size, and calculating the distance by road
of schools from each category of town.
Digital Elevation Model (DEM) can be used for visualising terrain,
conducting visibility analysis and for generating river catchments and
stream networks. We have used DEMs for numerous projects including
calculating river profiles, analysing road steepness and mapping the
visual impact of powerline pylons.