DLG update method

Abstract

The invention discloses a DLG update method comprising the following steps: making data forming rules; carrying out format conversion; carrying out data model conversion; building an element database model; using contrast analysis to automatically finish change detection between multi-source elements in a same zone and semi-automatic fusion update; using highly efficient space analysis and attribute filtering to carry out automatic extraction from element data to basic data. The DLG update method combines national condition data with basic plotting data for fusion update, thus breaking a conventional data forming mode, and emphasizing on fusion; the DLG update method is suitable for multi-source data update, can make forming plans, thus preventing repeatedly production, effectively reducing production cost, greatly improving production efficiency, and complying with the digital line DLG update development trend.

Description

technical field [0001] The present invention relates to the field of DLG update, in particular to a DLG update method. Background technique [0002] At present, the commonly used methods for DLG update are: combination of internal and external business and data update mode, local update mode based on provincial, city (county) basic surveying and mapping data sharing, and element-by-element update mode based on professional data sharing. The combination of internal and external business and data update method is the most conventional update method, but the method is traditional, the update cycle is long, the workload is heavy, and the cost is high. However, the local update mode based on the sharing of basic surveying and mapping data in provinces and cities (counties) is suitable for places covered by large-scale data. Taking advantage of the characteristics of fast update of large-scale data, the 1:10,000 line drawing data is downsized and updated, but there are downsizing ...

AI Technical Summary

Problems solved by technology

The combination of internal and external business and data update method is the most common update method, but its method is traditional, the update cycle is long, the workload is heavy, and the cost is high

However, the local update mode based on the sharing of basic surveying and mapping data in provinces and cities (counties) is suitable for places covered by large-scale data. Taking advantage of the characteristics of fast update of large-scale data, the 1:10,000 line drawing data is downsized and updated, but there are downsizing rules that are difficult to unify. , the disadvantage of a large amount of manual intervention

The sub-element update mode based on professional data sharing is suitable for the update of core elements and has the advantage of data authority, but it also has the disadvantage that data cannot be fully updated

Images