Topological Quantitatively Method for Spurious Increments Removed of Area Water

Spurious increments exists inevitably in the results of difference operator because of data inconsistency in the process of increments recognition,and it has reduced the accuracy of change.The existing methods using quantitative threshold,lead to true increments over-removed and spurious increments not recognized,and reduce the accuracy of the results.With the heavy demands in updating of National Spatial Database at scale of 1∶ 50 000,a new method called topological quantitatively method is proposed,which integrates topological relations and buffer analysis to remove the spurious increments of area water.The experimental results show that the proposed method is valid and has stronger practicality.