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GIS model optimization method and system based on LOD organization and scheduling method

A scheduling method and optimization method technology, applied in the field of data processing, can solve problems such as high data network speed and bandwidth requirements, reduced rendering performance, and occupation of memory and video memory, so as to solve the problem of freezing and waiting, improve rendering speed, and improve rendering performance. Effect

Active Publication Date: 2019-09-24
CHONGQING MAS SCI & TECH CO LTD
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Problems solved by technology

At present, in the GIS field for the pipeline industry, the model data is directly loaded after the system is started for static display. However, when the amount of model data is large, the above loading process has the following defects. First, the loading time is too long , the system is in a waiting state for a long time, the second is that it takes up a lot of memory and video memory, and even causes the system to crash. High standard

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  • GIS model optimization method and system based on LOD organization and scheduling method
  • GIS model optimization method and system based on LOD organization and scheduling method

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Embodiment Construction

[0047] The present invention is further described below:

[0048] The present invention provides a kind of GIS model optimization method based on LOD preprocessing and dispatching, it is characterized in that: comprise the following steps:

[0049] S1: Preprocess the target data to generate basic terrain tiles; the terrain tiles include zero-level tiles and leaf node tiles;

[0050] S2: According to the initial viewing area, load terrain tiles that meet the display conditions within the initial viewing area, and render according to the initial LOD level;

[0051] S3: Determine whether the current viewing area has changed. If so, determine the changed tile list according to the display conditions, delete the tile data that does not meet the display conditions in the new viewing area, and load the tile data that meets the display conditions in the new viewing area. The tile data of the display condition is stored in the cache; if not, the model data of the current tile is still...

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Abstract

The invention provides a GIS model optimization method and system based on an LOD organization and scheduling method, and relates to the technical field of data processing, and the method comprises the following steps: carrying out the preprocessing of target data, and generating a basic terrain tile; according to an initial view field, loading topographic tiles meeting a display condition in the initial view field range, and performing rendering according to an initial LOD level; s3, judging whether the current view field is changed or not, and generating a tile list according to the new view field; sending the tile data conforming to the display condition to a renderer for rendering operation, performing tile division on mass model data through a quadtree and an R tree, and achieving the purposes of reducing memory and rendering batches through a model merging technology, a texture map merging technology and a texture LOD technology, thereby improving the visualization performance of the system.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a GIS model optimization method and system based on an LOD organization and scheduling method. Background technique [0002] Geographic Information System (GIS, Geographic Information System) is based on geospatial database, with the support of computer software and hardware, using the theory of system engineering and information science, scientifically manages and comprehensively analyzes geographic data with spatial connotation to provide A technical system for information required for management, decision-making, etc. Simply put, GIS is a technical system that comprehensively processes and analyzes geospatial data. It is based on surveying and mapping, uses databases as data sources for data storage and use, and uses computer programming as a platform for real-time global spatial analysis. At present, in the GIS field for the pipeline industry, the model data is direc...

Claims

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Application Information

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IPC IPC(8): G06T15/00G06T15/04G06T17/05
CPCG06T15/005G06T15/04G06T17/05
Inventor 刘航刘桥喜边帅王帅军杨伟良
Owner CHONGQING MAS SCI & TECH CO LTD
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