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Method and system for constructing rasterized surface for measuring landform fragmentation degree

A construction method and landform technology, applied in the field of rasterized surface construction, can solve problems such as the difficulty of directly describing the degree of landform fragmentation

Active Publication Date: 2021-10-29
云南户外图科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the application of some geographical indicators, it is difficult to directly describe the degree of fragmentation of landforms by directly using DEM or DTM

Method used

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  • Method and system for constructing rasterized surface for measuring landform fragmentation degree
  • Method and system for constructing rasterized surface for measuring landform fragmentation degree

Examples

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Embodiment 1

[0055] Such as figure 1 As shown, this embodiment provides a method for constructing a rasterized surface for measuring the fragmentation degree of landforms, which includes the following steps:

[0056] 1. Acquire the landform model D by computer; use the digital terrain model to perform grid resampling or terrain scale transformation to obtain landform expression data at a certain pixel scale, and obtain the landform model D. The landform model D adopts digital elevation model DEM or digital terrain model DTM expressed by computer.

[0057] 2. Perform preprocessing on the landform model D to obtain preprocessed data D'; specifically: perform format conversion, projection transformation and noise filtering on the landform model data D to obtain preprocessed data D'; The projection transformation uses the projection algorithm of the geographic information system software to transform the projection transformation of the landform model data with geographic coordinates into pla...

Embodiment 2

[0082] Such as figure 2 As shown, this embodiment provides a system for constructing a gridded surface for measuring the degree of fragmentation of landforms, which adopts a method for constructing a gridded surface for measuring the degree of fragmentation of landforms in Embodiment 1, and includes:

[0083] The terrain data module is used to obtain the terrain model;

[0084] A preprocessing module, configured to preprocess the landform model to obtain preprocessed data;

[0085] The landform change difference surface calculation module is used to perform window standard deviation statistics on the preprocessed data to obtain the rasterized surface of the degree of elevation difference in the horizontal direction (X-Y plane) in different landform units in the entire geographical area data;

[0086] The geomorphic uplift and horizontal cutting depth surface calculation module is used to extract the geomorphic height difference from the preprocessed data, and obtain the gri...

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Abstract

The present invention relates to the technical field of gridded terrain curved surface construction, and relates to a method and system for constructing a gridded curved surface for measuring the fragmentation degree of landforms. Processed data; 3. Perform window standard deviation statistics to obtain rasterized surface data representing the degree of landform elevation difference; 4. Extract landform height difference to obtain rasterized surface data representing landform uplift and horizontal cutting depth; 5. Extract the ravine density to obtain the rasterized surface data representing the terrain cutting density; 6. Calculate and obtain the rasterized terrain surface to measure the fragmentation degree of the landform. The invention can accurately describe and express the true degree of landform fragmentation, and is beneficial to constructing various geoscience indexes and depicting corresponding geographical environment forms.

Description

technical field [0001] The present invention relates to the technical field of gridded terrain surface construction, and furthermore, to the technical field of simulating, virtualizing and calculating the temporal and spatial distribution of earth resources and environments with gridded electronic maps, in particular, to a method for measuring landform fragmentation A method and system for constructing a level rasterized surface. Background technique [0002] In the natural geographical environment, land units on a certain spatial scale do not have a complete and regular distribution of landforms, but a certain number of broken small patches, which are characterized by continuous or discontinuous distribution. The broken landform is consistent with the direction of the continuous rising huge mountain surface wind, and the wind direction changes more frequently in broken mountains, which can lead to special airflow changes and affect temperature distribution, water vapor tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/05G06T7/64
CPCG06T17/05G06T7/64
Inventor 周汝良王艳霞
Owner 云南户外图科技有限公司
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