Still water area treatment method and device

A treatment method, water technology, applied in the direction of measuring device, height/level measurement, reflection/reradiation of radio waves, etc., can solve problems such as overflow in still waters
CN107677239AActive Publication Date: 2018-02-09AERIAL PHOTOGRAMMETRY & REMOTE SENSING CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
AERIAL PHOTOGRAMMETRY & REMOTE SENSING CO LTD
Publication Date
2018-02-09

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Abstract

The invention provides a still water area treatment method and device. The method comprises the following steps: classifying cloud points collected by an airborne laser radar, so as to obtain multipleground points; taking the ground points, which are located in a range wherein a target still water area is, of the multiple ground points as first ground points; collecting the ground points within apreset range around the target still water area as second ground points; finding out a target ground point with a minimum elevation value from the first ground points and the second ground points, subtracting a preset value from the elevation value of the target ground point to obtain a difference value which is used as an elevation value of the target still water area, generating an irregular triangular mesh based on the elevation value of the target still water area, and manufacturing a digital elevation model based on the irregular triangular mesh. Therefore, overflowing of the still waterarea in the manufactured digital elevation model can be avoided.
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Description

technical field

[0001] The present invention relates to the technical field of airborne LiDAR (Light Detection And Ranging, LiDAR), in particular to a method and device for processing still waters. Background technique

[0002] Still waters refer to waters where the water surface is still, such as ponds, lakes, reservoirs, etc. In the process of digital elevation model (Digital Elevation Model, DEM) production, the elevation value is given to it according to the LiDAR ground points adjacent to the still water. However, this elevation value is not necessarily the minimum value for the still water area, resulting in still water overflow, that is, the height of the still water exceeds the height of its surroundings. Contents of the invention

[0003] In view of this, the purpose of the present invention is to provide a still water treatment method and device to improve the above problems.

[0004] In order to achieve the above purpose, an embodiment of the present invention...

Claims

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