Building elevation positioning control and precision evaluation method based on satellite images

Abstract

The invention relates to a building elevation positioning control and precision evaluation method based on satellite images, belonging to the fields of acquisition and updating of urban spatial data of satellite three-dimensional remote sensing data. The method comprises the following concrete steps: (1) carrying out the field survey by a GPS to acquire ground control point data; (2) carrying out block bundle adjustment on aerial images to acquire building roof coordinates; (3) integrating the acquired horizontal coordinate with the building roof vertical coordinate acquired by airborne LiDAR data to acquire a building roof control point; (4) geometrically positioning high-resolution satellite three-dimensional images based on a rational function model (RFM) in an image space to acquire three-dimensional coordinates of the ground and the building roof; and (5) acquiring the relation between the elevation of the control point and the elevation precision of the point pattern of a check point by adopting the building elevation positioning control and precision evaluation scheme based on the point pattern. The invention can promote the application of high-resolution satellite three-dimensional remote sensing images in the fields of acquisition and updating of urban spatial data.

Description

technical field [0001] The invention belongs to the application field of satellite stereoscopic remote sensing data urban space data acquisition and update, and relates to a method for building elevation positioning control and accuracy evaluation based on satellite images, in particular to a high-resolution satellite stereoscopic image building based on multi-source remote sensing data Object elevation positioning control and accuracy evaluation method. Background technique [0002] High-resolution satellite images are currently one of the most important sources of spatial information in the field of earth observation. Research on all aspects of high-resolution satellite images has become a research hotspot in related fields, and high-precision geometric positioning is the key to high-resolution The basis and key of various applications of satellite imagery, its research has achieved certain results so far. At present, the widely used rational function model RFM has achiev...

AI Technical Summary

Problems solved by technology

[0024] In order to solve the deficiencies of existing high-resolution satellite image geometric positioning technology in densely built areas, the purpose of the present invention is to provide a method for building elevation positioning control and accuracy evaluation based on satellite image, which combines GPS measurement, aerial image and machine Load the LiDAR point cloud data, and then get the relationship between the height of the building control point and the height accuracy of the check point

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