Automatic identification method and device for coast erosion and sedimentation based on shoreline data

Abstract

The invention discloses an automatic identification method and device for coast erosion and sedimentation based on shoreline data, and belongs to the field of ocean monitoring. The method comprises the following steps: firstly, acquiring coastline vector data of two time phases, and respectively performing topology check on the coastline vector data to ensure that a coastline has two end points and does not coincide with each other; secondly, based on coastline vector data of two time phases, according to a specific spatial analysis method, automatically obtaining a gap region, automatically giving two attributes of sedimentation and erosion according to a certain rule, carrying out consistency check and precision evaluation, and finally obtaining the distribution range and area of sedimentation and erosion. The method and device can automatically extract erosion and sedimentation areas, reduce misjudgment, erroneous judgment and missed judgment caused by artificial interpretation, improve the detection speed, and quickly and accurately obtain the dynamic change of coastal zone 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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