Counterpart river identification method based on morphological characteristics

A recognition method and morphological feature technology, applied in the field of geographic information technology and hydrology, to improve recognition efficiency and avoid misjudgment and missed judgment

Active Publication Date: 2019-02-15
NANJING NORMAL UNIVERSITY
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  • Description
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Problems solved by technology

In contrast, the research on identifying specific rivers by recognizing the morphological characteristics of water systems with the help of computer automation has yet to be further developed

Method used

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  • Counterpart river identification method based on morphological characteristics
  • Counterpart river identification method based on morphological characteristics
  • Counterpart river identification method based on morphological characteristics

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Embodiment Construction

[0050] Technical scheme of the present invention is described in detail below, what the experimental data of this example adopted is the water system data ( figure 1 ). There are rich types of water systems in the area, and the impact of tectonic movement on their formation is obvious. Further explanation will be given below by describing a specific embodiment in conjunction with the accompanying drawings.

[0051] like figure 2 As shown, the morphological feature-based counterpart river identification method provided in this embodiment specifically includes the following steps:

[0052] (1) Calculate the flow direction of each river based on the river system vector line layer and DEM data in the study area, and store the flow direction information in the collection ToID={t i |i=0,1,2...nr-1}, t i represents the river r i A sub-set of river serial numbers in the flow direction, nr is the number of rivers. In this embodiment, nr=196.

[0053] (1-1) Read the river line dat...

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Abstract

The invention discloses a counterpart river identification method based on morphological characteristics, in particular comprising the following steps: firstly, calculating the river flow direction based on a vector water system map of a research area and combining DEM data of the research area; and secondly, calculating the river flow direction based on the vector water system map of the researcharea. Secondly, the two straight river sections which constitute the river intersection angle are extracted and the river intersection angle is calculated. At last, two rivers with flat angle are recorded, and the corresponding river map layer is generated. The invention can quickly realize automatic extraction of the estuary river by calculating the flow direction, extracting the straight line edge, calculating the intersection angle of the rivers and other links on the existing vector water system network diagram. Compared with the prior art, the present invention not only improves the identification efficiency, but also effectively avoids misjudgment and missed judgment in manual operation.

Description

technical field [0001] The invention relates to the fields of geographic information technology and hydrology, in particular to a method for identifying counterpart rivers based on morphological features. Background technique [0002] Rivers are the most extensive and active exogenous forces acting on the earth's surface, and they are the main pathways of land water cycle. 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, so it will present a unique arrangement with the regular arrangement of the extensions on the plane figure. A large number of previous studies have shown that the drainage system style, river terrace, and valley shape will respond positively to tectonic activities such as folding and faulting. Through the analysis of water system characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 董甜甜李安波徐诗宇闾国年
Owner NANJING NORMAL UNIVERSITY
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