Method for extracting plane geometric indexes and topological structures of rivers

Abstract

The invention discloses a method for extracting plane geometric indexes and topological structures of rivers. The IPC classification number of the method is E02B1 / 00. The method is based on a complex network analysis technology, takes a satellite picture as an input quantity, and is composed of four main parts of extraction of a river channel water body, description of a river center line skeleton, identification and detection of river branching points and end points, and extraction of a river network topology structure and plane geometric indexes. The continuity of the extracted river channel is ensured as much as possible while the influence of a sand dam and the like on the plane form of the river channel is avoided, so that the method also has relatively high applicability to braided rivers, deformed river bays and the like with complex plane forms. A large amount of manpower and material resources cost brought by field measurement is saved, the accuracy and diversity of the obtained data are considered, and technical support is provided for river research.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to an automatic extraction method of a river plane geometric index and topological structure based on complex network analysis technology, and its IPC classification number is E02B1 / 00. Background technique [0002] River systems on Earth often have different planar forms, which are often considered to be closely related to river behavior. One of the main contents of river bed evolution is to study the relationship between the above two. For this reason, it is necessary to define a series of quantitative indicators including channel width, channel length, branch angle, tortuosity and migration rate to distinguish and describe Different river plan forms. Therefore, it has always been one of the hot issues in river research to efficiently and accurately map and evaluate the planar morphology of rivers and extract corresponding geometric indicators fr...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high cost and low efficiency in the process of extracting river plane indicators by traditional on-site measurement means, and under the premise of ensuring the continuity of the extracted river course and the diversity of index data, a new method is proposed. Automatic Extraction Method of River Plane Geometric Index and Topological Structure Based on Complex Network Analysis Technology

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