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River capture automatic identification method

An automatic identification and river technology, applied in the field of geographic information technology and hydrology, can solve the problems of different levels of interpretation, misjudgment and missed judgment, and poor extraction effect, so as to improve recognition efficiency and avoid misjudgment and missed judgment Effect

Active Publication Date: 2019-09-10
南京泛在地理信息产业研究院有限公司 +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This recognition method based on manual interpretation not only has low recognition efficiency and poor extraction effect, but also easily leads to misjudgment and missed judgment due to different interpretation levels in actual operation.

Method used

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  • River capture automatic identification method

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Embodiment Construction

[0055] In order to describe the technical solution disclosed in the present invention in detail, further elaboration will be made below in conjunction with the drawings and specific embodiments.

[0056] This embodiment provides a method for automatic identification of river raids, such as figure 1 As shown, the experimental data adopts the water system data in the Lushan area in Shapefile format, the longitude is between 115°52′37″E and 116°3′39″E, and the latitude is between 29°27′33″N and 29°37′28″ Between N, such as figure 2 shown.

[0057] The method for automatically identifying river raids provided in this embodiment specifically includes the following steps:

[0058] Step 1: Obtain the river system vector line layer of the area to be identified, extract the flow direction feature point fPoint of each river segment from it, and calculate the length and inDeg of each river segment.

[0059] This step specifically includes the following steps:

[0060] (1-1) Obtain t...

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Abstract

The invention discloses a river capture automatic identification method, which comprises the following specific steps of (1) calculating the river reach flow direction feature points and the river reach flow directions based on a research area vector water system graph; (2) forming a confluence pair by the river reaches according to a confluence relationship; (3) based on an included angle betweenthe branch flow direction and the main flow direction, screening a confluence pair approximating to a right angle; (4) calculating an included angle between branches, and screening a confluence pairwith the included angle between the branches being a flat angle and the branches being collinear; and (5) screening a shorter confluence pair with the branch inflow of 0 to generate a river capture seizure layer. Compared with the prior art, the method has the advantages that the automation degree is high, and the excessive misjudgment during manual interpretation can be effectively avoided.

Description

technical field [0001] The invention relates to the fields of geographic information technology and hydrology, in particular to an automatic identification method for river capture constrained by spatial structure and morphological features. Background technique [0002] The water system is a channel system composed of rivers of different grades within the basin. In addition to being controlled by the natural environment, the formation of the morphological characteristics of the water system is also affected by the geological structure, which will present a unique spatial structure and morphological characteristics on the plan. At present, a large number of studies have shown that the drainage system style, river terraces, and valley morphology will respond positively to tectonic activities such as folding and faulting. Through the analysis of water system characteristics such as water system density and morphological characteristics, the analysis of geological structure an...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06T11/20
CPCG06T11/206G06V30/422
Inventor 马启源李安波王平
Owner 南京泛在地理信息产业研究院有限公司
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