topographic map data updating 地形图数据更新
By using 1:500 topographic map updating 1:2000 topographic through generalization of automatic cartography, decrease the burden of UBGIS data revision.
通过地图自动缩编利用1:50 0地形图更新1:20 00地形图,减少城市基础地理信息系统的更新负担。
Study application methods of the multi-sources data in map production, including sort of sources, data collection, and data processing, in order to updating the map and spatial data in one platform.
对地图生产中的多源数据利用作了较为全面的研究,包括资料分类、数据获取方法和数据处理方法。把各种资料数据统一在一个应用平台上,保证了地图和空间数据的现势性;
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