地质制图中CASS到MapGIS数据无缝自动转换的实现

摘要

The geological department always works with MAPGIS software, but the workers of digital surveying and mapping are using CASS software, the data format is absolutely different. So there are a lot of obstacles in the two popular software data exchanging for a long time, which brings a lot of inconvenience to the geology, land and many other sectors of user's work. This paper discusses characteristics and conversion method between CASS and MapGIS in the format of the data by writing reading CASS data program code, the CASS diagram entity type was subdivided into point, line, surface, text, and block. Then the data which has been read out were converted to MapGIS format dot, line, face, text, and sub graph through the restructure MapGIS data program code. The experiment was proved by the Inner Mongolia Baotou Habuqin iron mine, where topographic map realized the automatic conversion of the two data format and also reduced the data loss to the process of conversion at the ultimate in the paper and at last.%长期以来,国内流行的数字测图软件南方CASS与地质部门使用的MapGIS数据软件交换存在很大的障碍,这给地质、国土等很多部门用户的工作带来诸多不便。本文从实际应用的角度出发,深入探讨了两者的数据格式特点,编写了读取转换数据代码,将CASS图中实体类型读出为点、线、面、文字、块,然后分别转换为MapGIS中的点、线、面、文字、子图,实现了两种数据的无缝自动转换,最大限度地减少了转换过程中的数据丢失。最后,在内蒙古包头哈不沁铁矿地形图的转换实践中得以检验。