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A method for dynamically generating fine coast topography on a three-dimensional digital earth

A dynamic generation, three-dimensional digital technology, applied in image data processing, character and pattern recognition, 3D modeling, etc., can solve problems such as time-consuming, inability to display high-precision coastlines, and inability to meet

Active Publication Date: 2019-05-10
四川华控图形科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, taking the currently popular Google Earth and osgearth as examples, neither of them can display high-precision coastlines. They can only use satellite images as coastline textures, and the display effect is poor.
[0003]There are currently some related technologies for the grid calculation method of 3D digital earth terrain refinement, a kind of inverse distance weighted method (IDW--Inverse Distance Weighted), in the coastline In the case of complex shapes, the effect is poor
The other is the Spline with Barriers method. The calculation process of this method is relatively complicated and takes a long time, which cannot meet the requirements of real-time generation of high-precision coastal terrain in the 3D digital earth.

Method used

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  • A method for dynamically generating fine coast topography on a three-dimensional digital earth
  • A method for dynamically generating fine coast topography on a three-dimensional digital earth
  • A method for dynamically generating fine coast topography on a three-dimensional digital earth

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Embodiment 1

[0022] A method for dynamically generating fine coastal terrain on a three-dimensional digital earth, characterized in that the method includes the following steps: S1: data acquisition and preprocessing, including acquisition of satellite image data, ground elevation data and coastline vector data, and Including data preprocessing of satellite image data, ground elevation data and coastline vector data; S2: Coastline data extraction processing, using satellite image data, ground elevation data and coastline vector data processing to extract coastline data; S3: Coastal terrain grid data S4: Generation of coastal detail texture data, including object information recognition of satellite image data , which is to identify the land, sea and confluence areas on both sides of the coastline in the satellite image data, and use the area information to generate a coast type mask map. The mask map data reflects the details of the area range of different types of coastlines Texture and m...

Embodiment 2

[0035] The present invention provides a method for establishing and presenting seawater and fine coast effects on a three-dimensional digital planet, including data acquisition, coastline extraction processing, coast type (bedrock, sandy, gravel, artificial four types) mask generation, Ocean and land mesh refined 3D modeling and rendering.

[0036] Step 1. Data Acquisition

[0037] High-resolution and high-precision satellite pictures are taken by high-resolution remote sensing satellites, ground elevation information is obtained by satellite-borne equipment, and the existing coastline vector database, all data are processed and used as input for subsequent steps.

[0038] The specific handling of the complaint is:

[0039] The satellite image data is registered and fused to obtain high-precision color image data, and the known control points are used to perform geometric correction and projection correction on the data.

[0040] The high-level data is interpolated to solve ...

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Abstract

The invention discloses a method for dynamically generating fine coast topography on a three-dimensional digital earth, and relates to the field of earth dynamic generation of fine coast topography. The method comprises the following steps: S1, acquiring and preprocessing data; S2, performing coastline data extraction processing; S3, generating coastal topographic grid data; and S4, generating coastal detail texture data. The method is based on the existing terrain generation technology; UTILIZING SATELLITE PICTURE DATA, ground elevation data and coastline vector data; By combining an innovative coastline high-precision topographic grid generation algorithm and an innovative detail texture generation algorithm, high-precision coastline, coastline topographic grids and coastline detail textures are obtained, three-dimensional digital earth coastline topography with the generation precision and effect closer to those of a real environment is generated, and the method can be widely applied to the fields of geographic information systems, simulation and the like.

Description

technical field [0001] The invention relates to the field of dynamically generating fine coastal topography from the earth, in particular to a method for dynamically generating fine coastal topography on a three-dimensional digital earth. Background technique [0002] In recent years, due to various human and natural reasons, the greenhouse effect has appeared on the earth, that is, the global climate is gradually warming. Global warming causes glaciers to recede and sea level to rise, so the monitoring of sea level rise can realize the monitoring of global warming to a certain extent. Therefore, as the sea level rises due to global warming, people pay more and more attention to the changes of the coastline, so there is a demand for coastline analysis and display in 3D scenes. However, taking the currently popular Google Earth and osgearth as examples, both cannot display high-precision coastlines, and can only use satellite images as coastline textures to display poor resu...

Claims

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Application Information

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IPC IPC(8): G06T17/05G06K9/46
Inventor 赵瑛峰楼伟苏飏黄永华黄超
Owner 四川华控图形科技有限公司
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