High-precision water channel reconstruction method based on multi-star-source information coupling

Abstract

The invention provides a high-precision water channel reconstruction method based on multi-star-source information coupling. The method comprises a water channel section determination method, a basic water channel section high-precision coupling reconstruction method, a fixed water channel section coupling reconstruction method and a river reach water channel terrain reconstruction method. According to the method, the blank of surveying and mapping a water channel based on satellite remote sensing information is filled up, the vertical and plane precision of an existing satellite digital surface model for the river water channel is greatly improved, and decision support can be provided for wading emergency rescue in areas lacking data.

Description

technical field [0001] The invention relates to the technical field of waterway surveying and mapping applications, in particular to a high-precision waterway reconstruction method based on multi-star source information coupling. Background technique [0002] Due to the different purposes of satellite remote sensing, the plane or vertical resolutions are quite different. At present, the plane resolution of high-precision panchromatic orthophotos can reach within 50cm, and the vertical resolution of radar altimeters or laser altimeters can reach within 10cm. The plane and elevation information of these two types of satellites often cannot be obtained or distinguished at the same time. The most advanced satellite three-dimensional image (GSM) has a plane and vertical resolution of tens of meters, and it cannot meet the requirements of high-precision surveying and mapping when used alone. [0003] With the advancement of technology, the plane or vertical resolution of satellit...

AI Technical Summary

Problems solved by technology

At present, the plane resolution of high-precision panchromatic orthophotos can reach within 50cm, and the vertical resolution of radar altimeters or laser altimeters can reach within 10cm. The plane and elevation information of these two types of satellites often cannot be obtained or distinguished at the same time. The most advanced satellite three-dimensional image (GSM) has a plane and vertical resolution of tens of meters, and it cannot meet the requirements of high-precision surveying and mapping when used alone

[0003] With the advancement of technology, the plane or vertical resolution of satellites will be further improved. However, no matter what kind of satellites can only carry out plane or elevation information observations above the water surface, they cannot obtain terrain data below the water surface.