Beach monitoring method based on tide model and photogrammetry technology

Abstract

The invention relates to a beach monitoring method based on a tide model and a photogrammetry technology, wherein the method comprises the following steps: S1, arranging a shooting terminal for shooting a beach picture, and calibrating the shooting terminal to obtain a collinear equation for coordinate conversion between an image point and a corresponding ground point; S2, enabling the shooting terminal to shoot a beach picture, and carrying out waterline extraction on the beach picture to obtain pixel coordinates of a waterline; S3, establishing a tide model of the sea area where the currentbeach is located, obtaining the elevation corresponding to the waterline in S2 based on the tide model, and converting the pixel coordinates of the waterline into field coordinates by using a collinear equation based on the elevation of the waterline; and S4, generating a beach digital elevation model based on the on-site coordinates of the multi-temporal waterline. Compared with the prior art, high-precision unmanned dynamic monitoring of the beach is realized, and the accuracy is high.

Description

technical field [0001] The invention relates to the technical field of beach surveying and mapping, in particular to a beach monitoring method based on tide model and photogrammetry technology. Background technique [0002] The beach ecological environment is complex and diverse, and is subject to the alternating influence of relatively large physical and chemical factors. The formed beach ecosystem is also relatively complex, with important resources, ecology and environmental value. The beach ecological environment is related to the survival of human beings and the reliability of marine resources. The study on the evolution of beach morphology is one of the key scientific issues related to the long-term sustainability of the beach ecosystem and related coastal defense issues. [0003] The traditional beach digital elevation model (Digital Elevation Model, DEM) surveying and mapping method is mainly field timed and fixed-point measurement. This kind of measurement method i...

AI Technical Summary

Problems solved by technology

This type of measurement method is labor-intensive, has a long working cycle, and is inefficient. It is difficult to realize the dynamic monitoring of the coastal zone, and limited by the geographical environment and weather conditions, some survey areas are difficult to reach, and surveying and mapping are difficult.

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