Discussion on Large-Scale GIS Data Update Service Framework

The performance of CAD data in graphic expression,storage and management is very perfect.It can meet most of the graphics drawing application.Because this kind of CAD data is not good at the preservation and management of the properties related to the spatial location information,which means this data formats can't well support graphics and attributes of both GIS application.Converted from existing CAD data and then updating the GIS database is not a simple process of the data format conversion.It relates to the transformation of the data model,change in storage management and many other complex issues.The progress of its research will directly affect the current GIS data update mode and the process.This article is based on the characteristics of the CAD and GIS data.It targets automatically updating of the current CAD data acquisition to the GIS database,and discusses from several aspects of the system architecture,functional structure and workflow of large-scale GIS data update service framework.