Automatic identification method and device for coastal erosion and deposition based on shoreline data

Abstract

The invention discloses an automatic identification method and device for coastal erosion and deposition based on shoreline data, belonging to the field of marine monitoring. The present invention first obtains the coastline vector data of two time phases, and performs topological inspection on the coastline vector data respectively to ensure that the coastline has two endpoints and does not overlap; secondly, based on the coastline vector data of the two time phases, according to a specific spatial analysis method , to automatically obtain the "gap area", and at the same time automatically assign two attributes of "siltation" and "erosion" according to certain rules, and perform consistency check and accuracy evaluation, and finally obtain the distribution range and area of ​​deposition and erosion. The invention can automatically extract erosion and deposition areas, reduce misjudgment, misjudgment, and missed judgment caused by human interpretation, improve detection speed, and can quickly and accurately obtain dynamic changes in coastal intertidal zone information.

Description

technical field [0001] The invention relates to the field of marine monitoring, in particular to an automatic identification method and device for coastal erosion and deposition based on shoreline data. Background technique [0002] The coastal zone is the key zone for the interaction between the ocean and the land. As the boundary between the sea and the land, the coastline not only records the changes of the coastal tidal flats and the decline of the wetland ecosystem, but also its spatial fluctuation and property changes reflect the transformation of the coastal zone's erosion-siltation process and The way and dynamic process of human development, utilization and protection of coastline. [0003] The intertidal zone of the coastal zone is affected by natural and human effects, and periodically changes the landform of the coast. For example, the land in the intertidal zone is silted toward the sea to form a tidal flat wetland, or the coast is eroded by natural disasters to...

AI Technical Summary

Problems solved by technology

[0005] The traditional method is manual participation in the whole process. The advantage is that it is simple and easy to implement when the image background is simple, the tidal flat area changes greatly, and the coastal zone is small; but its shortcomings and shortcomings are also obvious, mainly in the face of small Gap area, visual observation and identification are relatively difficult, and the coastal zone covers a large area, which takes a lot of time and requires more interpreters. At the same time, due to the differences in professional background and understanding of interpreters, manual interpretation There may be errors in the misjudgment of "siltation" and "erosion" attributes, as well as the potential risk of missing small areas; the interpretation accuracy has certain limitations

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