Supercharge Your Innovation With Domain-Expert AI Agents!

High-recognizability DEM manufacturing method

A production method and recognition technology, applied in 3D modeling, image data processing, instruments, etc., can solve the problems of large DEM errors and achieve the effects of reducing fluctuations, reducing errors, and high precision

Pending Publication Date: 2021-09-28
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the highly identifiable DEM production method provided by the present invention solves the problem of large errors in the DEM formed by direct interpolation after the on-site survey of the terrain near the turning point and the contour

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-recognizability DEM manufacturing method
  • High-recognizability DEM manufacturing method
  • High-recognizability DEM manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0075] Example 1: Highly recognizable DEM generation under high-density terrain data

[0076] The following is an example of Quantou Township, an internal village in Baiyangdian Lake, and its complex waters, combined with figure 2 The DEM created by this scheme will be described.

[0077] The selected area is located inside the Baiyangdian lake, and the internal water system structure is complex. It is difficult to obtain a high-precision DEM by terrain interpolation through the surveyed terrain elevation points, and the error after interpolation is large, and it is difficult to reflect the overall landform contour characteristics on the DEM.

[0078] In this regard, the highly recognizable DEM production method provided by this program is used to produce the DEM of Baiyangdian Lake:

[0079] Firstly, the stage of object contour line detection is carried out;

[0080] Next, the production of statistical eigenvalues: DEM download with a spatial resolution of 30m, extraction ...

example 2

[0088] Example 2: Generation of highly recognizable DEM under sparse typical elevation control points

[0089] In this example, the area near the Yellow River Delta is selected, and the remote sensing image of the DEM interpolation area is as follows Figure 4 As shown in , this area is dominated by farmland, embankments and rivers, and the terrain in the same area is relatively flat.

[0090] The topographic interpolation of this area is performed based on the measured elevation points. There are 29 measured elevation points, all of which are typical control points. The interpolation method of the existing technology is the same as that of Example 1, and the effect diagram of the DEM obtained after the interpolation of this scheme and the existing technology is as follows Figure 5 As shown, the spatial resolution is 10m.

[0091] Compared Figure 5 In (a) and (b), the DEM made with high recognizability can still reflect the topography well in areas with few terrain elevat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a high-recognizability DEM manufacturing method. The method comprises the steps that a research area image is obtained through inlaying and splicing; performing edge detection on the research area image to obtain a ground feature contour line in the to-be-researched area; acquiring a surface vector polygon enclosed by the ground feature contour lines and a surface vector polygon formed by the ground feature contour lines, and performing statistics on a feature value of each polygon by combining DEM data with the resolution of 30m; combining the corresponding polygons into the same block when the feature value similarity is greater than a preset threshold value; generating high-precision DEM (Digital Elevation Model) data corresponding to each block by adopting a geostatistics interpolation method in combination with terrain elevation point data; and embedding the raster data of each block, and merging the high-precision DEM data of all the blocks into the high-precision DEM data of the to-be-researched area.

Description

technical field [0001] The invention relates to the field of DEM production, in particular to a highly recognizable DEM production method. Background technique [0002] The full name of DEM is Digital Elevation Model, which is a solid surface model that expresses ground elevation in the form of a set of ordered numerical arrays. For water conservancy projects, some existing simulations of hydrological runoff, rainfall, flood control and disaster reduction all need the support of DEM, and terrain data is the most basic and core part of hydrological model simulation. [0003] The existing DEM products on the market have certain errors. If the existing DEM products are directly used for hydrological model simulation, it is difficult to accurately simulate the actual hydrological runoff process, resulting in certain simulation accuracy errors in flood control and disaster reduction. In this regard, in the process of hydrological simulation, field survey topographic data is ofte...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06T17/05G06T5/00G06T5/50G06T7/13
CPCG06T17/05G06T5/50G06T7/13G06T2207/10036G06T2207/10041G06T2207/20221G06T2207/30184G06T5/80
Inventor 龚家国尹迎身王英秦韬尚毅梓
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com