Overseas power line selection method based on multi-source satellite remote sensing image joint adjustment

Abstract

The invention is applicable to the technical field of power transmission line survey and line selection, and relates to an overseas power line selection method based on multi-source satellite remote sensing image joint adjustment, which comprises the following steps: obtaining a multi-source satellite remote sensing image and DEM elevation data; Acquiring a control point, an inspection point, a connection point and a weak intersection connection point of the multi-source satellite remote sensing image; Obtaining an object space plane coordinate initial value of the weak intersection connectionpoint through the image space coordinate of the weak intersection connection point and the RPC parameter; Ground elevation values are interpolated through DEM elevation data, and object space elevation initial values of weak intersection connection points are obtained; And according to the RPC parameters, the control points, the connection points and the weak intersection connection points of thesatellite remote sensing images, combining the initial values to carry out regional network joint adjustment based on the multi-source satellite remote sensing images, and evaluating the applicability and the satisfaction degree of overseas power line selection mapping through an adjustment precision report. According to the invention, the application of the multi-source satellite remote sensingimage in a large-area power line survey and line selection project is realized, and the construction period of overseas power line selection is shortened.

Description

technical field [0001] The invention relates to the technical field of power transmission line survey and line selection, in particular to an overseas power line selection method based on joint adjustment of multi-source satellite remote sensing images. Background technique [0002] In the current overseas power line survey and line selection project, due to the large area of ​​the overseas work area and the very complex terrain, it is difficult to achieve complete coverage of the overseas work area by relying on a single satellite remote sensing image data. Therefore, the joint use of multi-source satellite remote sensing images, It is necessary to introduce other satellite remote sensing data. The traditional regional network adjustment of satellite remote sensing images is based on the principle of intersection of the same-named ray pairs in the overlapping areas of adjacent images to realize the construction of the regional network, so as to perform overall adjustment on...

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Problems solved by technology

[0004] The main purpose of the present invention is to propose a method for overseas power line selection based on the joint adjustment of multi-source satellite remote sensing images to solve the problem of weak intersecting state in some areas of multi-source satellite remote sensing images in the engineering of overseas power line survey and line selection , the error of the regional network adjustment is relatively large, which makes the multi-source satellite remote sensing images unable to meet the accuracy of overseas power site selection and line selection mapping

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