Application of Elevation Points and Note Matching;

Aiming at the existed problem of sparsing elevation points in traditional topographic map generalization,this paper presented the sparsing method for elevation points based on feature points.

A method was presented for obtaining the 3D coordinates of the elevation points from the contour lines by segmenting the contour lines equidistantly,and the program codes and examples were also presented.

The checking items have basic control point,near shaft point for orientation and elevation starting point,shaft mouth coordinate,underground traverse point and elevation starting point,underground roadway and productive workings extension.

The Decision Methods of the Altitudes of GPS Points;

In view of REM and height for suspending points,this paper points out the methods that solve practical problems,and provides the theory basis for the practical application.