A Tile Coding Method for Decoupling Geometric Attributes of Vector Data

A technology of vector data and geometric attributes, which is applied in the field of tile coding where the geometric attributes of vector data are decoupled, can solve the problems of dynamic projection conversion and drawing of difficult vector tiles, increase storage burden, etc., to meet the needs of dynamic projection drawing and reduce data The effect of storage stress

Active Publication Date: 2022-03-15
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

[0003] The existing vector tiles mainly focus on static visualization requirements at the data organization level, so their internal geometric information is stored according to screen pixel coordinates, and each tile stores geometry and attributes in a centralized manner, which makes it difficult to Utilizing vector tiles for dynamic projection conversion drawing also causes the same spatial entity to repeatedly store its attribute information in different levels of vector tiles, which increases the burden of storage

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  • A Tile Coding Method for Decoupling Geometric Attributes of Vector Data
  • A Tile Coding Method for Decoupling Geometric Attributes of Vector Data
  • A Tile Coding Method for Decoupling Geometric Attributes of Vector Data

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[0026] Such as figure 1 As shown, a tile encoding method for decoupling geometric attributes of vector data includes the following steps:

[0027] (1) Initialize the vector data slice parameters, and set the main parameters of the vector data slices;

[0028] (2) Tile attribute information storage: traverse each record of the spatial database, obtain the tile range of the geometric information of each record at the current level, including the tile LXY in the lower left corner and the tile LXY in the upper right corner, and correct the range to obtain The smallest level tile that can fully contain this range, calculate the IDCode of the smallest level tile as the unique ID of the attribute tile, and then sequentially obtain the attribute value of the target field of the current record, and temporarily store the attribute value in the attribute tile ID as In the identified attribute value storage, finally use the ID of the attribute tile as the unique ID of the tile attribute ...

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Abstract

The invention discloses a tile coding method for decoupling geometric attributes of vector data, which comprises the following steps: (1) initializing vector data slice parameters; (2) storing tile attribute information into a database; (3) slicing vector data; (4) ) Encoding of geometric information; (5) Storage of tile geometric information. The present invention proposes a vector tile data organization method that decouples geometric attributes, stores geometric information based on the relative coordinates of latitude and longitude, and uses tile association strategies to realize separate and associative storage of geometric information and attribute information, thereby satisfying the dynamics of the application side. Projection drawing requirements, and reduce data storage pressure.

Description

technical field [0001] The invention relates to the technical field of slicing of GIS spatial data, in particular to a tile encoding method for decoupling geometric attributes of vector data. Background technique [0002] Vector data is an effective carrier for expressing geospatial information. With the continuous development of observation and measurement technology, large-scale vector data has become the data basis for many practical applications. In order to be able to efficiently express large-scale vector data in map visualization, vector tile technology has become the most recognized solution at present. [0003] The existing vector tiles mainly focus on static visualization requirements at the data organization level, so their internal geometric information is stored according to screen pixel coordinates, and each tile stores geometry and attributes in a centralized manner, which makes it difficult to The use of vector tiles for dynamic projection conversion renderi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/56G06F16/587
CPCG06F16/56G06F16/587
Inventor 张一鸣蒉露超郭奇程默于辉陈佰权丁茜
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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