Statistical query method and system for grid data

A technology for statistical query and raster data, applied in the field of statistics, it can solve the problems of low accuracy and slow statistical query operation, and achieve the effect of solving the accuracy and improving the speed.

Active Publication Date: 2013-05-01
BEIJING DATUM TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The embodiment of the present invention discloses a statistical query method and system for raster data to solve the problems of slow speed and low accuracy of statistical query operations in the background technology

Method used

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  • Statistical query method and system for grid data
  • Statistical query method and system for grid data
  • Statistical query method and system for grid data

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Experimental program
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Effect test

Embodiment 1

[0062] A statistical query method for raster data disclosed in the embodiment of the present invention is introduced in detail.

[0063] refer to figure 1 , shows a flow chart of a statistical query method for raster data in an embodiment of the present invention.

[0064] Step 100, after receiving the statistical query request information sent by the client, query whether there is a record corresponding to the statistical query request information in the region table.

[0065] For example, a client sends a statistical query request message for statistically querying the total population density of Beijing. After receiving the information, it queries whether there is a record of the total population density of Beijing in the region table.

[0066] Step 102, when it does not exist, perform a statistical query operation according to the statistical query request information, send the statistical query result to the client, and save the statistical query result to the region tab...

Embodiment 2

[0073] A statistical query method for raster data disclosed in the embodiment of the present invention is introduced in detail.

[0074] refer to figure 2 , shows a flow chart of a statistical query method for raster data in an embodiment of the present invention.

[0075] Step 200, before receiving the statistical query request information sent by the client, create an area table.

[0076] The statistical query request information may specifically include: geometric boundaries and statistical types;

[0077] Wherein, the geometric boundaries may specifically include: general geometric boundaries and special geometric boundaries.

[0078] The area table may specifically include: a general area table and a special area table.

[0079] Wherein, the records in the general area table may specifically include: general geometric boundaries, statistical types and statistical values.

[0080] The records in the special area table may specifically include: special geometric bounda...

Embodiment 3

[0133] A statistical query system for grid data disclosed in the embodiment of the present invention is introduced in detail.

[0134] refer to Figure 4 , showing a structural diagram of a grid data statistical query system in an embodiment of the present invention.

[0135] The statistical query system for grid data may specifically include:

[0136] Record query module 30, and statistics query module 32.

[0137] The function of each module and the relationship between each module are described in detail below.

[0138] The record query module 30 is configured to, after receiving the statistics query request information sent by the client, query whether there is a record corresponding to the statistics query request information in the area table.

[0139] For example, if a client sends out a statistical query request message for a statistical query of the total population density in Beijing, the record query module 30, after receiving the information, queries the area ta...

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Abstract

The embodiment of the invention discloses a statistical query method and a statistical query system for grid data and aims to solve the problems that a statistical query operation is low in speed and low in accuracy in the background art. The method comprises the following steps of: querying whether a record which corresponds to a statistical query requesting information exists in region list or not after the statistical query requesting information sent by a client is received; performing a statistical query operation according to the statistical query requesting information when the record does not exist, sending a statistical query result to the client, and saving the statistical query result to the region list; and sending the statistical query result in the record to the client when the record exists. According to the statistical query method and system for the grid data, disclosed by the embodiment of the invention, the statistical query speed is increased; the problem that the statistical query result is low in accuracy due to frequent statistical query on data files is also solved; and meanwhile, the statistical query efficiency when grid data files are updated is also improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of statistics, and in particular, to a method and system for statistical query of grid data. Background technique [0002] The raster data structure is simple and intuitive, and it is very beneficial to the operation and processing of the computer. It is a common spatial basic data format of the Geographic Information System (GIS). Spatial analysis based on raster data is the foundation of GIS spatial analysis. Statistical query is one of the important functions of the GIS spatial analysis module and one of the indispensable businesses in the GIS application system. For example, in the special work of the national census, it is often necessary to Count the total population of a province or a certain region, calculate the average population density, etc.; in the national water regime monitoring work, it is often necessary to conduct statistical queries on the maximum rainfall and minimum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 孙成宝张瑞侠
Owner BEIJING DATUM TECH DEV
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