Foshan Underground Pipeline Information System Development And Its Spatial Data Quality Control

the development of technology of Geography information System ,G IS become more and more good and GIS is converted to Spatial Decision Support Information System from Processing System.GIS is used very widely by many departments of government and company.On then other hand , peopl e find some questions of GIS.For Example, some systems can not run to the aim which the system is designed for and Some Systems make mistaken concl usions.So many people and department oppose or question GIS.They say that they will not invest in GIS or they will withdraw from GIS.This situation of the failed Systems make people interest in it . People try to find out what is t he reason which make the system failing.finally , people find that the uncertai nty of spatial data is one of main reasons.Firstly, This paper study and analyse the source of the uncertainty of spatial data.and then this paper introduce the development history of it and th e new achievement about the theory of it.At the same time, this paper study and introduce the theory and method of Spatial Data quality control and Spatia 1 Data evaluation.At last ,with the develop of the Underground Pipeline Mana gement Information System of Foshan City this paper introduce the questions a nd solution of pipeline data quality in detail and program the data control mo del of The Uderground Pipeline Management Information System of Foshan Cit...