在栅格数据模型中,地图的准确性还依赖于地图的比例。
In the raster data model, the map's accuracy also depends on the map's scale.
在此基础上,提出了开放式地图出版数据模型的研究体系。
Then, the research architecture about open map publishing data model is ascertained.
因此,本文就如何利用特征数据模型对地图集中的南极数据进行描述作了阐述。
Therefore, this paper expatiates how to describe Antarctic data of the Atlas by feature-based data model.
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