中比例尺地图
- 网络medium scale maps;intermediate scale map;medium-scale map
中比例尺地图-
GIS中不同比例尺地图数据综合问题探讨
THE Discussion on GIS Data Integration From Differance Scale Maps
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在中、小比例尺地图上编绘地貌要素和水文要素应充分利用卫星像片。
Satellite photograph should be fully apllied to edit and draw elements of geomorphology and hydrology on middle or small scale map .
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作者通过变焦数据模型原理，探讨如何建立多层存贮结构，将数字地图中的大比例尺地图数据库自动导出小比例尺图形。
This paper discusses how to establish multilayer storage structure and automatically reduce small scale graph from large scale mapping database by theory of changed-focuses Datum Model .