Study on quality control of spatial data in the Poyang lake area
Liu Xiao-sheng, WU Wei-bo · Cehui kexue · 2006
The area of Poyang Lake is one of the nine commercial food production bases in China.It's also the place where floods often occur.In order to reduce the impact and damage of floods on the lives and properties of people living in the Poyang Lake Area,the authors have developed a Geographical Information System for preventing and controlling floods in the Poyang Lake Area with the strong assist of the Science and Technology Office and the Water Conservancy Office in Jiangxi province.The system uses various techniques to obtain,transmit and process spatial data.These techniques have produce a large quantity of multi source spatial data,which provides abundant and thorough information support for the fast and accurate decision on preventing and controlling floods,but,at the same time,needs a higher request to control the quality of spatial data.According to the occurring sequence of quality problems of spatial data,the authors classify these problems,analyse their reasons and propose a control method.This paper depicts and discusses the whole process of the study,at five stages of obtaining,storage,processing,transition and application of spatial data.