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A technology of vector data and calculation method, which is applied in the field of vector data online calculation, and can solve problems such as inability to meet large-scale calculation scenarios
Pending Publication Date: 2021-02-23
高崟
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Since the original vector data will increase the data volume after rasterization, when...
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Embodiment 1
[0055] figure 1 It is a flow chart of the vector data online calculation method provided by Embodiment 1 of the present invention.
[0056] refer to figure 1 , the method includes the following steps:
[0057] Step S101, acquiring vector data;
[0058] Here, the vector data is defined as CGCS2000 latitude and longitude coordinates, that is to say, the latitude and longitude coordinates of the vector data conform to the national geodetic coordinates.
[0059] Step S102, constructing a vector data thematic map according to the vector data;
[0060] Specifically, the vector data includes multiple types of vector data, and according to the mapping relationship between each type of vector data and the corresponding gray value, grayscale mapping is performed on the original vector data to obtain a vector data thematic map.
[0061] Step S103, performing standardized grid slicing processing on the vector data thematic map to obtain multiple tiles;
[0062] Specifically, accordin...
Embodiment 2
[0093] Figure 4 It is a schematic diagram of the vector data online computing device provided by Embodiment 2 of the present invention.
[0094] refer to Figure 4 , the device consists of:
[0095] Vector data acquisition unit 1, configured to acquire vector data;
[0096] Construction unit 2, for constructing vector data thematic maps according to vector data;
[0097] The grid slice processing unit 3 is used to perform standardized grid slice processing on the vector data thematic map to obtain multiple tiles;
[0098] The selection unit 4 is used to select the desired tile level that is compatible with the preset data statistical accuracy requirements according to the corresponding relationship between each tile's corresponding level and accuracy, and according to the preset data statistical accuracy requirements;
[0099] A tile data set acquisition unit 5, configured to obtain a tile data set that requires tile-level intersecting within the set spatial area range acco...
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Abstract
The invention provides a vector data online calculation method and device. The method comprises the steps of constructing a vector data thematic map according to vector data; performing standardized grid slicing processing on the vector data thematic map to obtain a plurality of tiles; according to the corresponding relationship between the corresponding hierarchy of each tile and the precision, selecting an optimal tile hierarchy adaptive to the statistical precision requirement according to the preset data statistical precision requirement; in a set space region range, according to space range intersection judgment, obtaining an intersection tile data set of the required tile hierarchy; taking a single tile as a minimum calculation unit for the tile data set, obtaining tile gray scale statistical results one by one through a vector data gray scale statistical algorithm, and summarizing the gray scale statistical results of the whole tile data set; according to the gray scale statistics results of all the tiles and the pixel area of each tile under the corresponding hierarchy of the tiles, obtaining the gray scale statistics area of a set space region range; vector data calculation requirements of different precisions can be met, and the vector data calculation efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of natural resource information statistics, in particular to a vector data online calculation method and device. Background technique [0002] Vector data reflects the true state of land cover, and accurate statistics of the spatial area distribution of various land types are of great significance for refined natural resource management, land space supervision, and ecological protection and restoration. [0003] At present, vector data has the characteristics of large data volume and complex polygon structure. Conventional vector data calculations include vector calculations and raster calculations. In vector calculations, based on the original vector data, geographical information calculation operators are used to perform spatial calculations on vector data to form data statistics results. Because the original vector data has the characteristics of large data volume and complex structure, it is difficult t...
Claims
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