Data quality controlling is a important index for topographic digital map.

数据质量控制是良好的数字地形图质量的重要保证。

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Firstly, the request of vector map data is summarized, such as color-setting standard, attribute definition of topographic feature, etc.

首先对入库的矢量图形数据要求做了概述，如要素的分层设色标准、地形图要素属性项定义等；

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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。

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BaseCamp displays topographic map data in 2-D or 3-D on their computer screen, including contour lines and elevation profiles.

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