Update Technologies for Multi-scale Spatial Database

Spatial database updating is a bottleneck in GIS,which needed to be resolved urgently.Some data updating modes and technologies are discussed,and a multi-scale data updating scheme is presented based on CHT_EUR spatial database model.It can automatically and effectively identifies those changed data in updating by some methods such as spatial feature matching,comparing attribute and implement linkage updating of multi-scale spatial data based on linkage-relation which constructed by geographical object,settled the disaccord of multi-scale data.The scheme is significant to maintain the current spatial data and perfect data product system.