Production And Publication Of2.5D Electronic Map

As the map service based on WebGIS and mobile GIS technology gradually becomesmainstream in GIS industry, map products need to be cheaper and fast in transmission speed,and3D electronic map products can not realize fast access and browsing in current network,therefore2.5D electronic map products based on oblique axis projection are becomingacceptable.2.5D electronic map not only succeeds the powerful functions in analysis andprocessing and data collection of2D electronic map, but also makes up for the disadvantageof presentation of2D GIS map using its vivid and real spatial presentation ability. It’ssignificant for application and promotion of urban GIS using the application platform of2.5Delectronic map established through studying2.5D electronic map production and mapprojection.This article uses satellite square and its surrounding area in Urumqi as the experimentalobject, through a series of procedures such as modeling from2D map to3D scene, texturecollection, model decals, rendering and map splicing, studies the method of fast establishmentof2.5D scene of small area, has reference value for the establishment of2.5D scene of largeareas in cities, analyzes influence on2.5D electronic map of different map projections,defines map projection and coordinate, and studies different map registration modes. It uses2.5D map to release map service, integrates online urban basic map service provided byArcGIS Online, compares WebGIS secondary development mode under the platform ofArcGIS Server, uses JavaScript API mode to establish a basic2.5D map application platform,on the basis of which partial functions can be designed and realized, providing usefulreference for establishing all kinds of2.5D thematic urban GIS.