gis a powerful coordinate transformation system can be carried out under three kinds of coordinate system conversion of four coordinates, you can learn GIS map projection of the students are very helpful

WSDN WEB Mini GIS小型地理信息系统
.................................\bin
.................................\...\WsdnGIS.dll
.................................\db
.................................\gis.aspx
.................................\gis_add.aspx
.................................\images
.................................\......\cjs.gif
.................................\......\dtczs.gif
.................................\......\fds.gif


.................................\......\mys.gif
.................................\......\sxs.gif
.................................\inc
.................................\...\content.ascx
.................................\...\main.ascx
.................................\readme.txt
.................................\search.aspx
.................................\showgis.aspx
.................................\WebForm1.aspx
.................................\WsdnGIS
.................................\.......\bin
.................................\.......\...\WsdnGIS.dll
.................................\.......\db
.................................\.......\gis.aspx
.................................\.......\gis_add.aspx
.................................\.......\images
.................................\.......\......\cjs.gif
.................................\.......\......\dtczs.gif
.................................\.......\......\fds.gif


.................................\.......\......\mys.gif
.................................\.......\......\sxs.gif
.................................\.......\inc
.................................\.......\...\content.ascx
.................................\.......\...\main.ascx
.................................\.......\search.aspx
.................................\.......\showgis.aspx
.................................\.......\WebForm1.aspx

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