Terrain identification processing method for tidal creek system
A technology for identification processing and tidal ditch, applied in the field of terrain data processing, can solve problems such as open coasts that are not suitable for distribution, and achieve the effect of ensuring the accuracy of identification
Active Publication Date: 2018-02-16
HOHAI UNIV
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However, the above two methods are not suitable for open coasts with a wide distribution range and large elevation changes (such as the coastal areas of Jiangsu, my country).
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[0037] This specific embodiment discloses a method for processing the terrain recognition of the tidal channel system. The method is used to process the terrain data obtained by UAV measurement. The measurement area is the on-site tidal flat-tidal channel system near Doulong Port in Jiangsu Province. The area is wide, the beach has a certain slope from land to sea, and there are potholes in some areas.
[0038] Such as figure 1 As shown, the method includes the following steps:
[0039] S1: Randomly select several tidal gully cross-sections on the tidal flat through ARCGIS software, and count the tidal gully cross-section size information, including the average width and depth of the cross-section and the approximate range of change, and then determine the tide based on the statistically obtained tidal gully cross-section size information The minimum depth of the trench is 0.04m, the minimum depth of the main tidal trench is 0.2m, the elevation comparison range is 10m, and the elev...
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The invention discloses a terrain identification processing method for a tidal creek system. The method comprises the following steps that: S1: converting the three-dimensional terrain data of a tidalflat into the form of a terrain data matrix; S2: judging a main tidal creek system; S3: judging a secondary tidal creek; S4: calculating a tidal creek depth matrix; S5: determining the central axis of the tidal creek; and S6: carrying out statistics on the dimension characteristics of a tidal creek fracture surface. The method is suitable for a tidal flat situation with large terrain undulation,the contour of the tidal creek can be accurately identified, and the original form of the tidal creek system can be kept; and firstly, the main tidal creek with a large scale can be identified, a discrimination range is gradually enlarged on the basis, the whole tidal creek system is filled, the identification accuracy of the secondary tidal creek with a small scale is guaranteed, and meanwhile, the influence of a tidal flat cavity on an identification result is avoided. The method is simultaneously suitable for the analysis and the extraction of a river network terrain.
Description
Technical field [0001] The invention relates to a terrain data processing method, in particular to a terrain recognition processing method of a tidal channel system. Background technique [0002] Tidal flats are widely distributed along the coast of China. Take the silty silt tidal flats along the Jiangsu coast as an example. The width of the intertidal zone is 6-8 kilometers, and the slope is extremely gentle, only about 0.1%. The beach sediments are mainly silt, Mainly silt. Most tidal flats are developed with tidal trench systems, which have the characteristics of rapid change and large swings. With the construction of coastal reclamation, ports and other coastal projects, the impact of the tidal channel system on the safety of coastal engineering buildings has attracted more and more attention. At the same time, the tidal flat-tidal channel system is an important habitat for birds and marine life. The evolution of tidal flats and tidal creeks is also particularly important ...
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IPC IPC(8): G06K9/00
CPCG06V20/13
Inventor 龚政耿亮周曾严佳伟张颖
Owner HOHAI UNIV