Vectorized extraction method of multi-feature change transition matrix of land utilization/cover elements

Abstract

The invention discloses a vectorized extraction method of multi-feature change transition matrix of land utilization / cover elements. The method comprises: obtaining two sets of same-form vector datasets of a study beginning period and ending period by preprocessing; acquiring matching elements through unidirectional matching, calculating overlap areas between the matching elements, and recording the same into an element matching change table; identifying change situations of the matching elements on selected features, and carrying out supplement recording; selecting element attribute featureson which change transition analysis is to be carried out, and carrying out initialization setting on a change transition matrix thereof; defining a Dictionary-type variable, and adding cells, which correspond to the matrix, into the variable; reading records item by item, carrying out cumulative calculation on the overlap areas, and assigning calculation results to values of the corresponding cells; and carrying out summary calculation and assignment on remaining information contents in the transition matrix to form the complete change transition matrix. According to the method, the change transition matrix of the multiple features can be automatically mined and generated from the land utilization / cover vector datasets of the different periods, and efficiency and accuracy are high.

Description

technical field [0001] The invention relates to a vectorized extraction method of a multi-feature change transfer matrix of land use / cover elements, and belongs to the technical field of geospatial information processing and analysis. Background technique [0002] As a basic modeling tool, the transfer matrix lists the transfer area of ​​land use / cover element characteristics in the form of a matrix, which not only directly reflects the structural quantity and transfer direction of land use / cover change in the study area, but also Moreover, it contains a variety of potential information such as change rate, change speed, and change trend, and has been widely used in the research and analysis of land use / cover change. [0003] At present, the calculation and generation of the transfer matrix generally uses remote sensing image raster data, and the calculation method generally consists of four steps: first, the remote sensing images at the beginning and end of the research per...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a vectorized extraction method of the multi-feature change transfer matrix of land use / cover elements, and solve the vectorized calculation of the transfer matrix of land use / cover change in the prior art Lack of automatic and efficient methods, frequent human-computer interaction, low efficiency, and error-prone problems

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