Method for filling valleys and terrains in shaded relief map with strong expressive force

An expressive and topographical technology, applied in image data processing, 3D image processing, instruments, etc., can solve the problem that the overall effect of the relief map is not good enough, and the smooth transition of contour lines cannot be achieved. The expression of valley terrain is accurate and natural, and the effect of strong three-dimensional sense

Pending Publication Date: 2020-08-14
扆亮海
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Problems solved by technology

The contour line of the valley terrain filled in this way extends along the normal direction of the valley terrain line, which is relatively straight and

Method used

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  • Method for filling valleys and terrains in shaded relief map with strong expressive force
  • Method for filling valleys and terrains in shaded relief map with strong expressive force
  • Method for filling valleys and terrains in shaded relief map with strong expressive force

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Embodiment Construction

[0059] The following is a further description of the technical solution of a highly expressive topography shaded map valley terrain filling method provided by the present invention in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention and implement it.

[0060] The present invention provides a highly expressive topography filling method for valleys in shaded topography maps. The valley terrain filling method is used to synthesize the digital elevation model, fill in the secondary valley terrain and delete terrain detail information, and fill in different levels of valleys in turn. The terrain generates digital elevation model layers with different comprehensive levels, that is, digital elevation model pyramids, and sets corresponding weight coefficients for each layer of digital elevation model layers. By adjusting the weight coefficients, the key terrain features in the reconstructed terrain are highlighted. ...

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Abstract

The invention provides a method for filling valleys and terrains in a relief map with strong expressive force. Topographic features can be well maintained when topographic detail information is deleted; according to the method, a digital elevation model pyramid is constructed; digital elevation model layers of different comprehensive degrees are generated by filling valley terrains of different levels. The weight coefficient of each digital elevation model layer is adjusted to highlight or weaken a certain layer, topographic features are well maintained while landform fragments are deleted, the key topographic features of the topography can be highlighted by setting the weight coefficient, and the digital landform shading map with good popularity, highlighted key points and strong three-dimensional sense is made. When the valley terrain is filled, the trend of surrounding contour lines in the valley terrain is considered, the elevation values of the grid units in the valley terrain areinterpolated in a segmented mode, the filled valley terrain is in smooth transition with the surrounding terrain, the valley terrain expression of the digital geomorphic shading map is more accurateand natural, and the geomorphic shading map is clearer and more attractive.

Description

technical field [0001] The invention relates to a topography filling method for valleys in a shaded topography map, in particular to a topography filling method for valleys in a shaded topography map with strong expressive force, and belongs to the technical field of topography rendering. Background technique [0002] Geomorphology is the general term for various forms on the earth's surface. There are many kinds of spatial physical forms, which can be divided into two categories: natural forms and artificial forms. The earth's surface has been constantly changing since its formation. Various landforms on the earth's surface are the result of the joint action of internal forces and external forces. The internal force factors determine the main form of the landform, and the erosion of external force factors forms the secondary form of the landform. The earth has a huge surface area and various landforms. Reasonable and correct representation of different landforms in maps of ...

Claims

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Application Information

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IPC IPC(8): G06T15/00G06T17/05
CPCG06T15/00G06T17/05
Inventor 扆亮海李蕊男
Owner 扆亮海
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