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A Method of Slope Shape Extraction and Recognition Based on Digital Elevation Model

A digital elevation model and identification method technology, applied in the field of geographic information, can solve the problem of inability to accurately quantify and calculate uncertain factors, and achieve the effect of accurate final identification results and accurate slope distribution results.

Inactive Publication Date: 2018-01-16
重庆大学建筑规划设计研究总院有限公司
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Problems solved by technology

However, the extraction of slope shape has been avoided by researchers because of its inability to accurately quantify calculations and the existence of a large number of uncertain factors.

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  • A Method of Slope Shape Extraction and Recognition Based on Digital Elevation Model
  • A Method of Slope Shape Extraction and Recognition Based on Digital Elevation Model
  • A Method of Slope Shape Extraction and Recognition Based on Digital Elevation Model

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[0026] The specific implementation methods of the present invention will be further described below with reference to the drawings and embodiments, but it should not be understood that the scope of the present invention is limited to the following embodiments. Without departing from the above-mentioned method of the present invention, various substitutions and changes based on common technical knowledge and conventional means in the field shall be included in the protection scope of the present invention.

[0027] Such as figure 2 As shown, it is a computer program flowchart woven using the implementation method of the present invention. The specific implementation steps include:

[0028] (1) Use the hydrological analysis tools in the GIS software to extract the watershed and watershed of the normal terrain and the inverse terrain respectively, and then merge the generated catchment basin with the reverse catchment basin, and then modify it to be unreasonable. , And finally get th...

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Abstract

The invention is a slope shape extraction and recognition method based on a digital elevation model, and aims to provide a method for extracting various slope shape classification information using a digital elevation model as a data source. Aiming at various difficulties in the process of extracting the slope shape with the digital elevation model as the data source, it is proposed that on the basis of dividing the slope unit, the steepest path of the slope can be found by using the method of contour line vertical line, and the obtained longitudinal The section line can better reflect the real slope shape of the slope. Afterwards, using the cubic function fitting method, the slope shape was identified in various situations, and the subjective process was transformed into a mathematical calculation, which can not only ensure that it is close to the real situation but also grasp the overall slope shape well. The invention better overcomes the influence of uncertain factors and the difficulty of objective quantification in the slope shape extraction and identification process, and proposes a set of feasible extraction and identification methods, which has certain practical application value.

Description

Technical field [0001] The invention relates to the field of geographic information. Background technique [0002] Slope shape is an important topographical feature and a decisive factor affecting the development of landslides. Therefore, whether in landslide prediction or land evaluation, slope shape extraction is involved. Today, the most commonly used data source for obtaining terrain information is the digital elevation model (hereinafter referred to as DEM), which is the digital expression of the elevation attributes of the surface shape. [0003] At present, with the rapid development of GIS technology, using DEM as an information source to extract various terrain quantitative factors, such as slope, aspect, surface curvature, terrain undulation, and surface roughness, has become a very mature technology. However, the extraction of slope shape has been evaded by researchers due to its inaccurate quantitative calculation and a large number of uncertain factors. Summary of th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/46
Inventor 王桂林孙帆方舟毛军吴曙光许明
Owner 重庆大学建筑规划设计研究总院有限公司
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