Definition: Surface

UN - Geographic Information Systems

A term often used to describe GIS raster or image data that describe continuous, smoothly varying phenomena, such as elevation or temperature. Even population density is sometimes represented as a raster surface.
Source:
United Nations, "Handbook on Geospatial Infrastructure in Support of Census Activities", Department of Economic and Social Affairs, Statistics Division, Studies in Methods, Series F No. 103, New York, 2009
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