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Three-dimensional map data processing method based on multiple detailed layers

A multi-level of detail, three-dimensional map technology, applied in image data processing, electrical digital data processing, special data processing applications, etc., can solve the problems of insufficient texture memory, information can not be timely, loading and other problems

Active Publication Date: 2016-03-23
KUNMING ENERSUN TECH
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Problems solved by technology

Providing such details will undoubtedly consume a lot of texture memory. Although this can provide clues for judging height and movement and avoid surface blurring, it will cause insufficient texture memory, so that a lot of really useful information cannot be loaded in time and smoothly.

Method used

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  • Three-dimensional map data processing method based on multiple detailed layers

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Embodiment Construction

[0071] See Figure 1-Figure 7 , a method for processing three-dimensional map data based on multiple levels of detail, the present invention is characterized in that it comprises 3 steps: digital orthophoto image cutting, digital elevation data cutting, elevation data mosaic and edge joining; wherein:

[0072] Digital orthophoto cutting: digital orthophoto cutting is to cut satellite images into tiles of 256*256 pixels according to the pyramid model, and the cut tiles are coded and named according to the format of l_r_c.png, where l is the layer of the pyramid model number, r is the row number of the pyramid model, and c is the column number of the pyramid model;

[0073] Digital elevation data cutting: digital elevation data cutting is to establish an irregular triangular network of contour lines and elevation points, and then cut them into small cubes of 256*256*256 pixels according to the pyramid model on the irregular basis to establish DEM data; after cutting Small cubes...

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Abstract

A three-dimensional map data processing method based on multiple detailed layers comprises three steps including digital orthographic image cutting, digital altitude data cutting, altitude data inlaying and edging. The highest three-dimensional map precision reaches 20 m at present. When a sight point is close with a surface texture, a single texture pixel will cover multiple pixel points under effects of a texture amplifier, so that an image becomes very vague. The three-dimensional map data processing method based on the multiple detailed layers provided by the invention increases definition of a three-dimensional map during display, wherein landform details are closer to real landform conditions; and real-time access performance of the three-dimensional map is enhanced by a database storage technology based on a three-dimensional model, pressure to a database server during access to the three-dimensional map is reduced, and concurrent access performance is also increased simultaneously.

Description

technical field [0001] The invention belongs to a method for processing three-dimensional map data of a power grid. Background technique [0002] With the continuous development of GIS technology, 3D GIS has been more and more widely used in the entire power industry. 3D simulation based on real scene data has shown extraordinary effects in various aspects such as power grid management, emergency repairs, and safety monitoring. Relying on superior image and data conditions, using advanced GIS, RS and virtual reality technologies to organically combine digital ground models, power transmission and transformation equipment models and various professional attribute information of the power sector, to establish a three-dimensional geographic information platform for power, which can realize Combined with basic geographic information data, the query and update of electric power professional data, the maintenance and safety inspection of power grid circuits, realize the spatial pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/05G06T17/20G06F17/30
CPCG06F16/29G06T17/05G06T17/20G06T2207/20128
Inventor 张浩赵涓冯玉喜任莹王艳涛张小波腾启韬
Owner KUNMING ENERSUN TECH
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