Abstract
Abstract Height information has always formed an integral part of Ordnance Survey's map information. From the days of depiction by hachuring on one inch maps to today's Digital Elevation Models the aim has always been to represent the terrain for strategic purposes.The combination of national terrain model coverage, increasing height resolution and the continuing improvement in computing power has the potential to open new areas and markets for digital map data. This will involve the integration of vector, raster and digital imagery, in a variety of complementary applications and outputs.The future for three dimensional elevation data looks promising. Before the end of the decade we might increasingly expect real-time interaction with 3-d mapping and models of some complexity.
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