Territorial vector data rendering method and system
A vector data and rendering system technology, applied in geographic information databases, structured data retrieval, special data processing applications, etc., can solve problems such as unable to meet the display requirements of national land vector data, and achieve the effect of reducing time and improving efficiency
Inactive Publication Date: 2020-01-31
中国国土勘测规划院
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Therefore, the thinning and simplification method of conventional vector tile technology cannot meet the display requirements of national vector data
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[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
[0037] Such as figure 1 As shown, according to the embodiment of the present invention, a method for rendering national territory vector data is provided. The method for rendering national territory vector data includes the following steps:
[0038] Step S101, for the preprocessing layer, according to the electronic map pyramid rules, generate pyramid grid unit information covering the whole layer level, wherein each grid unit contains an empty vector tile information string and an em...
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The invention provides a territorial vector data rendering method and system, and the method comprises the steps: generating pyramid grid unit information covering a whole graph level for a preprocessing graph layer, and enabling each grid unit to comprise an empty vector tile information string and empty utfgrid format attribute tile information; querying corresponding vector elements according to the coordinate range of each grid unit, and performing thinning screening on the queried vector elements; converting the vector elements obtained by thinning and screening into corresponding pixel coordinates, and storing a pixel coordinate string of the vector element corresponding to each grid unit into a vector tile information string of the grid unit; and converting the inquired vector element corresponding to each grid unit into a unique identification information string of all elements contained in each pixel in the grid unit, and storing the unique identification information string into the utfgrid format attribute tile information of the corresponding grid unit.
Description
technical field [0001] The invention relates to the field of geographic information processing, in particular to a method and system for rendering national vector data. Background technique [0002] When the traditional raster tile technology is applied to the display of massive vector data of the country, in order to ensure a better image effect in small and medium scales, it is usually necessary to downsize the data. Data reduction is a cartographic synthesis project, which cannot be completed through algorithm automation at present, and requires a lot of labor and material costs. [0003] As the timeliness requirements of various applications for national land data increase, in the foreseeable few years, the update frequency of national land data will be accelerated from annual update to quarterly update, and even monthly update in key areas. According to the existing technical methods, data downsizing will not keep up with the rhythm of land data update, resulting in th...
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IPC IPC(8): G06F16/29
CPCG06F16/29
Inventor 白晓飞张嘉汪秀莲张小桐李晶云张兆阳
Owner 中国国土勘测规划院