A method of building height measurement based on psinsar technology

Abstract

The invention discloses a building elevation measurement method based on PSInSAR technology, which specifically includes the following steps: S1: Based on a plurality of high-resolution SAR image data of a target city, a large InSAR database is generated through permanent scatterer synthetic aperture radar interferometry technology , to obtain the three-dimensional spatial position information of PS points in the target city; S2: Introduce statistical theory and signal estimation methods, based on the three-dimensional spatial positions of all PS point data within the target range, perform two spatial classification estimations to obtain the urban ground elevation; S3 : Introduce the building vector frame, select the PS points in each building, cluster the heights of the PS points in the building, remove the wrong points, and calculate the roof elevation; S4: subtract the elevation of the PS points on the roof from the elevation of the PS points on the ground, The height of the building is obtained, and the data acquisition is not limited by the airspace; relevant data can be obtained in a large range; the degree of automation is relatively high, and the rapid estimation of the building elevation of urban buildings can be realized.

Description

technical field [0001] The invention relates to the technical field of synthetic aperture radar interferometry, in particular to a method for measuring building elevation based on PSInSAR technology. Background technique [0002] With the promotion of the concept of smart city, urban quantification and urban digitalization are more and more favored by city managers. Among them, the white film of urban buildings has a certain market value as its base map. The white film of urban buildings is mainly composed of building vectors and building elevations. Large-scale building vector frames can be obtained on optical satellite basemaps; while large-scale urban building elevations are relatively complicated to obtain, generally through Lidar technology, and Lidar accuracy is relatively high. High, but corresponding to the high cost, and the main carrier of Lidar is drones and aircraft platforms. At present, most cities in China are banned from flying, and there are certain regulato...

AI Technical Summary

Problems solved by technology

The white film of urban buildings is mainly composed of building vectors and building elevations. Large-scale building vector frames can be obtained on optical satellite basemaps; while large-scale urban building elevations are relatively complicated to obtain, generally through Lidar technology, and Lidar accuracy is relatively high. High, but corresponding to the high cost, and the main carrier of Lidar is drones and aircraft platforms. At present, most cities in China are banned from flying, and there are certain regulatory restrictions

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