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

对来自不同比例尺地图的数据进行综合是每个ＧＩＳ应用系统所必需的．而进行数据综合的关键是要解决具有不同投影坐标系的各种地理要素的投影转换问题．ＧＩＳ核心软件一般都具有投影转换功能，但不能解决所有的投影转换问题，因为各国所采用的投影方法具有较大差别．ＡＲＣ／ＩＮＦＯ的Ｐｒｏｊｅｃｔ模块无法对我国地形图普遍采用的高期－克吕格投影与其它投影进行转换，这是每个ＡＲＣ／ＩＮＦＯ用户进行数据综合时都存在的技术问题．本人在利用ＡＲＣ／ＩＮＦＯ作为支撑软件建立淮河ＧＩＳ数据库时，对这一问题进行了试验研究，介绍解决这一问题的两种方法，并进行了对比分析．

In GIS database, it is necessary to integrate data from differance scale maps. The key of data integrating is to trans for projection and projection belt. The projecting function of GIS software can not meet the needs of Chinese map projection, bacause three are many differance in using map projection method between nations, for instance, ARC/INFO GIS software has not projection transfer funtion betwwen Gass and other projections. This paper discusses two methods of solving that problem.