Analysis and Display of Digital Elevation Models within a Quadtree-based Geographic Information System
نویسندگان
چکیده
Digital elevation models (DEM) are an essential component of many geographic information systems (GIS), especially in natural resources applications. Recently, a number of prototype geographic information systems based on quadtrees have been developed. Digital elevation data create special problems for quadtree systems, since neighboring grid cells seldom have identical values. In this paper, we present a strategy for integrating DEM data into a quadtree-based GIS. The Norton sequence, which is the basis of most linear quadtree systems, is used to provide cell addresses
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