QUANTITY CONTROL OF DIGITAL MAP

摘要

The quality is the life of surveying and mapping. Before printing or going to database, digital maps must to be checked completely. In the past we can check it only by means of manual ways, but this makes the cost higher, the period longer and the work harder. Quantity control of digital map is more complex than paper map. It includes studying characteristics of space data errors and errors analytic model, the topologic relation between the space elements, the system of space data's quality evaluating and checking, etc. The vector terrain data checking is a most important content in digital map quality control. The main method this paper presented includes form checking, attribute checking, ground feature's position checking, topologic relation checking, relation checking between attribute data and coordinate data, contour checking, etc.