Method and system for elevation precision control and correction of island remote sensing mapping

An island and elevation technology, which is applied in the field of elevation accuracy control and correction methods and systems for island remote sensing mapping, can solve the problems of islands falling below the sea surface and low elevation accuracy indicators.
CN103245324BInactive Publication Date: 2015-04-08CHINESE ACAD OF SURVEYING & MAPPING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINESE ACAD OF SURVEYING & MAPPING
Publication Date
2015-04-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method and a system for elevation precision control and correction of island remote sensing mapping, and relates to the technical field of geodetic surveying engineering. The method comprises the steps of S1, extracting shorelines from island remote sensing images; S2, obtaining a first average sea surface height and a second average sea surface height, and performing datum conversion on the second average sea surface height; S3, calculating geoidal surface; S4, carrying out harmonic analysis to obtain a tidal harmonic constant; S5, calculating elevation of mean high-water springs; S6, calculating and removing systematic errors of the shorelines in the island remote sensing images; and S7, fitting the shorelines in the island remote sensing images with the systematic errors removed and the shorelines on the mean high-water springs. Correction of the shorelines in the island remote sensing images is realized by fitting the fitting the shorelines in the island remote sensing images with the systematic errors removed and the shorelines on the mean high-water springs, thereby increasing the elevation precision obtained by the island remote sensing mapping.
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Description

technical field

[0001] The invention relates to the technical field of geodetic engineering, in particular to a method and system for controlling and correcting elevation accuracy of sea island remote sensing maps. Background technique

[0002] my country's sea area is vast, and the distribution of islands (reefs) is scattered and extremely uneven. There are more than 12,000 islands (reefs) of various types. Islands (reefs) are an important part of the national territory. Their precise location and basic geographic information are important basis for dividing territorial waters and other jurisdictional areas; comprehensively and accurately grasp the location of my country's islands (reefs) And geographic information is an important guarantee for safeguarding national sovereignty, safeguarding national security, and implementing marine development, and has important practical and far-reaching strategic significance. With the substantial improvement of spatial and spectral res...

Claims

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