The implementation of map projection transformation method based on MapObjecTs 2.1 component

The same map projection under unified coordinate system should be guaranteed to exchange, match and share the data in the same GIS and among different GIS and to carry out spatial analyses such as spatial overlay, buffer and shortest path analysis. Therefore, map projection transformation is much more important. A program for projection transformation between any two commonly used map projections is implemented under the software platform of Visual Basic 6.0 using (MapObjects) components.