A joint surveying and mapping processing method of laser altimetry points and three-line array stereo images on the same track

Abstract

The invention discloses a combined surveying and mapping processing method of laser altimetry points and three-line array stereoscopic images on the same track. In the method, the laser altimetry points are used as elevation control points, and the relative plane error of the orthographic images obtained by the laser altimetry points and the same track is used. Smaller features, to obtain the accurate image square coordinates of the laser altimetry points distributed in various terrain types (especially hills and mountainous terrain) on the three-line array stereo image; Construct the adjustment area network, and carry out the joint area network adjustment of the laser altimetry point and the stereo image; finally, update the imaging geometric model of the stereo image according to the adjustment results. The invention makes full use of the advantages of laser altimetry points and optical images being acquired on the same track and has extremely high elevation accuracy. Under the condition of no ground control point, the elevation accuracy of the three-line array stereoscopic image is effectively improved, and it provides a global high-precision solution for the use of satellite images. The construction of geographic information resources provides technical support.

Description

technical field [0001] The invention belongs to the technical field of remote sensing and photogrammetry, and relates to a combined geometric processing method of a laser height measuring point and a three-dimensional image, in particular to a combined surveying and mapping processing method of a laser height measuring point and a three-line array stereo image acquired on the same track. Background technique [0002] Mapping satellite stereo images have now become the main data source for multi-scale surveying and mapping geographic information products around the world. The biggest difficulty in using satellite stereo images to carry out surveying and mapping applications is to ensure the geometric accuracy of the images, especially the elevation accuracy. Although the geometric accuracy of satellite images can be effectively improved by using a sufficient amount of high-precision ground control data, when conducting global mapping applications, limited by political and eco...

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Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: in order to solve the problem that the geometric accuracy (especially the elevation accuracy) of the satellite image cannot meet the application of high-precision mapping under the condition of no ground control (such as the ground control point cannot be obtained in the overseas area), make full use of the laser Due to the characteristics of high elevation accuracy of the altimetry point and the small relative error between the laser altimetry point and the orthographic image obtained on the same track, a joint surveying and mapping processing method of the laser altimetry point and the three-line array stereoscopic image is proposed. , which can greatly improve the elevation accuracy of three-line array stereoscopic images in various terrain areas

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