Boundary digitizing method of cadastral plot

Abstract

The invention provides a boundary digitizing method of a cadastral plot, which comprises the following steps of: input step: inputting the scanning grid image of an existing paper cadastral map; division step: dividing the scanning grid image into a plurality of image objects to be classified; extraction step: building knowledge rules, applying an object-oriented analytic classifying method, and extracting a plot object from a plurality of image objects; vectorization step: vectorising the extracted plot object; and comprehensive summarization step: comprehensively summarizing the outline of the plot object, and finally obtaining the boundary element of the vectorization cadastral plot. The invention is used for solving the problem that the existing cadastral map digitizing method has low automation degree, large man-computer interaction workload and low efficiency.

Description

technical field [0001] The invention relates to the technical fields of cadastral surveying, geographical data acquisition and digital surveying and mapping, in particular to a boundary digitization method of a cadastral map block. Background technique [0002] With the continuous acceleration of urban construction, the appearance of the city has undergone tremendous changes, so the existing paper cadastral maps are extremely inconvenient to use and manage. Therefore, the digitization of the original paper maps and the merging of changed cadastral survey data have become inevitable. [0003] refer to figure 1 , which shows the processing flow of a method for digitizing cadastral maps in the prior art, which may mainly include the following parts: [0004] The first part mainly adopts digital input of online hand-held tracking digitizer or screen digitization after scanning input to digitally collect the required cadastral element data (mainly parcels or plot boundaries) on ...

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