Method for generating vector slices on demand in real time by GDB data

A data and slicing technology, applied in geographic information databases, structured data retrieval, database management systems, etc., can solve the problems of slow update of map slice data, complex polygon rendering and deformation, large data volume, etc., and achieve small data redundancy. , Solve the effect of slow data update and small data volume

Active Publication Date: 2019-12-20
INSPUR SOFTWARE CO LTD
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Problems solved by technology

[0011] In order to solve the above technical problems, the present invention proposes a method for generating vector slices from GDB data in real time and on demand, which solves the slow update of map slice data and the rendering deformation of complex polygons , data redundancy, and large data volume

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  • Method for generating vector slices on demand in real time by GDB data

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.

[0038] The technical scheme of the GDB data of the present invention to generate vector slices on demand in real time is as follows: figure 1 As shown, specifically:

[0039] (1) Analyze and read the GDB data according to the sliced ​​map web service (WMTS) standard, traverse the data and read it into the memory; obtain the data within the correspondin...

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Abstract

The invention provides a method for generating vector slices on demand in real time for GDB data, and belongs to the technical field of map data format conversion. The method generates efficient, lossless, low-redundancy and small-size vector slice data through the steps of analyzing data in a database, projecting and converting the data, encoding by adopting Google encoding rules and the like. According to the method, the problem of slow data updating is solved by adopting a dynamic request and real-time slice acquisition mode. By designing a thinning scheme, the problem of rendering deformation of a rendering engine on complex polygons is solved. An attribute matching mode is adopted to reduce data redundancy. And a Google encoding rule is adopted for encoding, so that the data volume isreduced.

Description

technical field [0001] The invention relates to map data format conversion technology, in particular to a method for generating vector slices from GDB data in real time and on demand. Background technique [0002] In recent years, with the development of computer performance and map technology, users have higher and higher requirements for map display and data. Traditional maps are displayed in slices, and there are slow data updates (each update requires a new slice, including data acquisition and data rendering into pictures, which takes a lot of time), large storage space, and high bandwidth occupation. O&M pressure. In view of this situation, the solution of using browser to render vector map came into being. GDB has many data files and complex structure. When rendering data, all data will be returned regardless of the size of the map in the visualization window. The large amount of data transmission will affect the user experience. [0003] Vector slices have distinct...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/25G06F16/29
CPCG06F16/258G06F16/29Y02D10/00
Inventor 张翔宋海涛王彦飞孙长福李玉苹
Owner INSPUR SOFTWARE CO LTD
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