Digital Topographic Map Contour Line Error Automatic Judgement Method Research

At present, most units still basically rely on artificial visual inspection error vector digital topographic map, but its mistakes tend to be more subtle, need in large scale will be found out. Such as elevation point elevation values and contour height value contradictions such contains a data attribute errors, basic can't check out the results by this way, need to test by programming. So by manual inspection alone the results of quality control means to keep pace with requirements, will waste a lot of manpower, this method in the check way, examination time, examination efficiency and other aspects are not satisfactory.But today's digital topographic map surveying and mapping industry inspection software is basically geared to the needs of GIS data warehousing inspection, and geared to the needs of people in the industry to figure when checking software is extremely scarce, in this case the author based on AutoCAD platform for secondary development, writing to apply for the purpose of digital topographic map checker, hoping to help the people in the industry to improve work efficiency,In AutoCAD platform, using C# language for secondary development, by writing the relevant procedures, inspection on digital topographic map related content, can automatically find need to check the digital topographic map of related content. And found in the wrong place to draw the circle as a reminder, due to the topographic map is more complex, still need to use human interaction, and finally by the inspectors determine whether in it there is an error, in AutoCAD text window with a command line make corresponding writing tip, for reference check.This program operation is simple,which can efficiently find specified types of errors, marking where there is an error accurately.