Method for storing vector data and indexing space

A technology of spatial indexing and vector data, which is used in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of reduced client-side visualization effect and increased network data transmission volume, so as to reduce network data transmission volume and improve effect of effect
CN101763422AInactive Publication Date: 2010-06-30BEIJING GUOXIN HUITONG SCI & TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING GUOXIN HUITONG SCI & TECH
Publication Date
2010-06-30
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a method for storing vector data and indexing a space of network browse transmission reduction, which is characterized in that: space vector data are organized in a data set table in a thematic layer form; each thematic layer consists of a thematic base table and a data table which is used for storing four kinds of thematic objects of a memory point type, a line type, a polygon type and a text type respectively according to data types; and depths and codes of quadtree indexes of each thematic object are recorded in the data table. The method comprises the following steps: browsing a space scope according to demands specified by a user; calculating the critical depth of a index; then extracting thematic objects of which tree depths are less than the critical depth in each thematic object of a database in sequence; and enabling the extracted thematic objects to well adapt to a visual scope of the user. The method can effectively reduce network data transmission quantity when the data are browsed according to the space index, easily improves the effect of data visualization, and is particularly effective for releasing and browsing maps of mobile equipment such as a mobile phone and the like.
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Description

technical field

[0001] The present invention relates to the fields of spatial data management and spatial information processing, in particular to establishing and storing spatial indexes for spatial vector data through a specific method, so that the spatial index-based spatial vector data can be quickly accessed. Background technique

[0002] As an important spatial data type, vector data has been widely used in the field of spatial information. However, due to its large amount of data and complex topological relations, it has always been a subject of concern to people to access these spatial data quickly and efficiently. At present, with the rapid development of networking, more and more demands are required to access and even maintain space vector data in remote servers in real time through LAN, Web, wireless networks, etc. For example, as a typical application, city managers use mobile devices with data collection functions such as PDAs to collect variable data such as ...

Claims

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