Two main ways of creating a grid geographic information system(GIS)are described

i. e.

the instant query method based on structured query language(SQL)database and the static publishing method based on slicing. The performance bottleneck and function limitations of the two ways in grid application are compared. The memory database oriented to device object is designed and developed. By using the partition and the paging storage technologies

the province wide graphic and pattern data on “transmission

substation

distribution and low voltage” are cached in the GIS application server. The spatial index is created

and incrementally updated with the network version iteration for highly efficient caching and indexing of a large-scale power grid model. Then the implementation method of graphics browser subsystem of provincial centralized power grid GIS platform using the technology is described. The GIS application server provides vector graphics WebService

and the B/S client carries out dynamic graphics rendering. Finally

in a pressure test of an actual online system

each server of the system developed processes more than 1 000 times of dynamic graphics browsing services per second in the tens of millions of grid equipment scale

and each service processing time is less than 0. 1 s.