Mobile updating method for change pattern spots in land use status change survey

Abstract

The invention discloses a mobile updating method for change pattern spots in land use status change survey. The mobile updating method is characterized by comprising the steps of orderly traversing geometric object elements from a base map pattern spot data set A according to the coordination information of updated patterns to obtain the changed geometric pattern spot information, next, judging the topological relation of two geometric objects according to the topological relation of the base map pattern spots An and the changed pattern spots B, and finally, updating the mobile changed pattern spots B into the base map pattern spot data set A, wherein the topological relation includes a disjoint relation, an inclusion relation and a coverage relation, an overlapping relation, an equivalence relation, an and included relation and a covered relation. The mobile updating method for change pattern spots in land use status change survey is capable of avoiding re-measurement of field data due to inaccurate change data, saving a certain time cost and improving the working efficiency.

Description

technical field [0001] The invention relates to a data processing method, in particular to a method for moving and updating changed map spots in the investigation of land use status change. Background technique [0002] The update method of space vector data mainly involves five steps: data acquisition; extraction and expression of change information; extraction of incremental information; update operation and update quality maintenance. The update process of map spot vector data is to use the remote sensing monitoring results of this year and the previous year's land survey database, combined with relevant survey data, use a third-party software platform to interpret and extract the change information of the whole land type to generate the vector of suspected changed map spots file; conduct field verification in the field, mainly use the data acquisition module through human-computer interaction, collect and change the graphic boundary, and determine the nature of the chang...

AI Technical Summary

Problems solved by technology

[0003] When updating the changed area data of the base map using the changed patches collected in the field, if there are problems such as incorrect coordinate points in the collected patches and insufficient coordinate accuracy, it will affect the accuracy of the updated base map data. At the same time, when checking the topology consistency of the updated data, there will be errors in the topological relationship. In this case, retesting and correction are required, which increases the workload of land use status change investigation and reduces work efficiency.

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