Using COM technology, the author design USDE for some popular GIS data for-mats and realize the integration of some different spatial data.

利用COM技术，作者设计出了基于目前几种流行的GIS数据格式的USDE，并成功地实现了对几种不同格式空间数据的集成应用。

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Transparent color, is mainly usde for all kinds of packaging, sealing, art decoration, office design, toy making and so on, very convenient.

颜为透明，主要用于：各类材料包装、封口、美工装饰、办公设计、玩具制作等，方便实用。

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