A Research into Key Technology of Flood Prevention Information System Based On GIS
Zuohua Miao · 2004
The paper presents a theoretical base for information system constructi on.The fundamental theory of space mathematical of large-scale GIS and the digit al earth is a new theory for GIS which overcomes the shortage of the traditional basic theory of spatial mathematics,which is based on mother earth coordinate s ystem adopts isometry skive column projection, In order to satisfy the requireme nt of water conservancy system, the author puts forward a vector-grid coalescenc e mentality which is sustained by the technology of GIS. The paper provides the flood prevention information system with a technical channel for,which employs t he DRG as the background reference, by which the consumer can label the symbol o f speciality entity at any time. The author develops the flood prevention inform ation system based on GIS of Xianning city and achieves satisfactory results.The new theory and technical channel have proved to have a prospect of execution.