In order to clearly define the underground rock mass structure

such as discontinuous construction face

including fracture

joint

layer and fault

on the platform of Visual Basic 6.0

the second development towards GIS function group parts-MapObjects

on the base of OCX technique was made; and boundary denotation of three-dimension data structure and three-dimension grid structure was harmoniously connected. Three-dimension grid structure as main

we attempt to denote real underground construction in less data. Improved method of three-dimension grip structure realize enlargement

reduction

browse to geological map layer in local plane and formation of underground section as well as multi-format input for analysis of stabilization. By successful utilization of the system

geological model of significant reservoir section in two sides of Zipingpu Key Water-control Project in Sichuan Province was created

which effectively guides landslide disposal and project of changing line in the district; moreover

successful reservation of reservoir is guaranteed.