It is a new approach to explore relief Automated Generalization, based on DEM skeleton characteristic point and line to automate generalize relief, through the extraction DEM terrain skeleton c.

Then a new method of block generalization based on street skeleton-line and building skeleton-line is put forward.

This is an analysis and generalization on hanging type, wire, lead elevation, structure rise, arm stay, phase splitting pattern, OCL post foundation of Qin-Shen Passenger Dedicated line OCL.