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A Statistical Method for Area Statistics of Spatial Data with Custom Range Based on Grid Spatial Index

A spatial index and spatial data technology, which is applied in image data processing, geographic information database, structured data retrieval, etc., can solve the problems of slow statistical speed, achieve the effect of occupying less resources, taking into account calculation accuracy, and improving calculation efficiency

Active Publication Date: 2022-03-25
CHONGQING GEOMATICS & REMOTE SENSING CENT +1
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Problems solved by technology

[0003] However, although the calculation results of this method are relatively accurate, the overall statistical speed is relatively slow due to the restriction of the intersection operation speed between polygons and polygon spaces.

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  • A Statistical Method for Area Statistics of Spatial Data with Custom Range Based on Grid Spatial Index
  • A Statistical Method for Area Statistics of Spatial Data with Custom Range Based on Grid Spatial Index
  • A Statistical Method for Area Statistics of Spatial Data with Custom Range Based on Grid Spatial Index

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Embodiment Construction

[0049] The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0050] like figure 1 As shown in , a statistical method for the area of ​​spatial data in a custom range based on the grid spatial index, the specific steps are as follows:

[0051] Step 1: The server side establishes a global grid subdivision model based on the dichotomy rule of the Cartesian coordinate system, encodes the spatial data after iterative bisection, and establishes a spatial grid index.

[0052] The establishment process of the global grid subdivision model is as follows:

[0053] Step 1.1: Based on the Cartesian coordinate system dichotomy rule, establish a global grid subdivision model and iteratively divide the earth into longitude and latitude dichotomies, and perform binary coding on each grid;

[0054] The Cartesian coordinate system dichotomy rule is: if this plane represents t...

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Abstract

The invention discloses a self-defined range spatial data area statistics method based on a grid spatial index, including establishing a global grid subdivision model on the server side based on the Cartesian coordinate system dichotomy rule, and encoding the spatial data after iterative bisection , to establish a spatial grid index; the mobile terminal draws a custom range on the map, and synchronously uploads the coordinates of the custom range and the ID of the spatial data layer to the server, and the server calculates the custom spatial range according to the spatial grid index The spatial index grid set of the corresponding spatial index level; the server side calculates the spatial data area of ​​the custom range according to the spatial index grid set and the spatial data layer ID, and returns the calculation result to the mobile terminal for display, etc. step. Its remarkable effects are: the calculation efficiency is improved, the calculation precision is high, and the resources are occupied less.

Description

technical field [0001] The invention relates to the technical field of spatial data processing, in particular to a statistical method for the area of ​​spatial data in a self-defined range based on a grid spatial index. Background technique [0002] With the development of mobile GIS technology, the need to count the spatial elements of the target layer after drawing the range on the mobile terminal is becoming more and more common. The current method is to convert the drawn custom range into a Json file and upload it to the server, then perform spatial intersection calculation with the target layer to obtain the statistical area, and finally return the calculation result to the mobile terminal for display. [0003] However, although the calculation results of this method are relatively accurate, the overall statistical speed is relatively slow due to the restriction of the calculation speed of the intersection operation between polygons and polygon spaces. To solve this pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/62G06F16/29
CPCG06F16/29G06T7/62
Inventor 余静杨航曾安明贾敦新梁星张泽烈袁超李林赵翔宇程宇翔钱文进王小勇余洋邵帅梁均军王岚秦瑛歆彭婧
Owner CHONGQING GEOMATICS & REMOTE SENSING CENT
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