Method for surveying terrain of danger areas in intertidal zone

Abstract

The invention discloses a method for surveying terrain of danger areas in an intertidal zone. According to the method, an unmanned plane low-altitude digital remote sensing system quickly obtains large scale true color aerial images, and in combination with tidal level observation data, a high-precision land and water boundary can be drawn after correction of office work, a contour line is obtained, and sequentially, measurement of high beach high-altitude terrain is realized. The method comprises the steps of field treatment and office work treatment. In comparison with the prior art, the unmanned plane low-altitude digital remote sensing system disclosed by the invention has special advantages unmatched by other remote sensing measures, the unmanned plane aerial photography system has the characteristics of being simple in structure, low in use cost, quick in response and easy to transfer, meanwhile, can flexibly and quickly obtain high-resolution, large-scale and highly up-to-date images.

Description

technical field [0001] The invention belongs to the field of surveying and mapping science and technology, and in particular relates to a topographic measurement method of an intertidal dangerous area. Background technique [0002] The intertidal zone refers to the area between the continental coastline and the 0-meter line of the theoretical lowest tidal level (theoretical depth datum). The intertidal zone topographic survey mainly measures the intertidal surface objects, landforms and survey point elevations. The current working methods mainly include: 1. There are no other obvious obstacles in the intertidal zone and factors that affect the travel of the survey ship, and the survey ship is used to collect underwater topographic survey data during the high tide period. Due to the draft of the survey ship and the limitations of hydroacoustic instruments, some shallow water areas cannot be surveyed. 2. For survey areas that are difficult to measure by survey ships, choose ...

AI Technical Summary

Problems solved by technology

Since part of the intertidal zone belongs to the silt flat, in the barren area, the surveyors are likely to fall into the silt and cannot get out of danger by themselves, especially when the tide comes, it is more likely to cause personal safety accidents; Only a few hundred meters, the measured range cannot be fully covered

3. Using conventional drone photography, its elevation accuracy is only about 0.50 meters, which cannot meet the required accuracy requirements

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