Several Key Technologies In The Updating Of Cadastral Database Based On Oracle Spatial

Cadastral database stored cadastral data which were managed by DBMS .According to the frequency of cadastral updating daily, it determined that we must update cadastral database timely.We made use of Oracle Spatial to manage cadastral data,and updated cadastral database by VC++ and MAPX.1) Firstly, According to the development of GIS database,Oracle Spatial was analyzed .Based to the character of Oracle Spatial database,tables stored cadastral information were designed.At last,Difference between Oracle Spatial and MapInfo was compared.2) As the premise of updating cadastral database,the pattern of Oracle Spatial query had important meaning.In the process of updating cadastral data,effective and historical data should be organized and managed. So we raised two models of spatio-temporal data.3) Evaluating precision had critical meaning for updating cadastral database.For the method of evaluating geometry uncertainty, we made further consideration.The author realized cadastral data of achieving in various databases and tables, and may accomplish various operations for different parcels,for example,Union,Split,modification of common border between parcels,and so on.According to some thoughts in the arcticle,the program might realized this function.For the disposal of attribute data,we may make use of SQL*PLUS in the Oracle.Attribute data table designed lied on the software of MAPINFO and SQL*PLUS. Special item could be altered by MAPINFO and SQL*PLUS software, then making use of EasyLoad,we uploaded this attribute data table to oracle database.