A method and terminal for rapid display of vector big data

A vector data and big data technology, applied in the field of graphic display, can solve the problems of long preprocessing time of raster tiles, users cannot dynamically modify the display style, etc., to achieve the effect of improving display performance, easy programming, and fast display.

Active Publication Date: 2022-08-02
FUZHOU TELEWARE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The advantage of the hybrid technology of raster tiles and dynamic display is to solve the problem of long preprocessing time of raster tiles while ensuring the display performance; the disadvantage is that the display style of tiles is static, and users cannot dynamically modify the display style

Method used

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  • A method and terminal for rapid display of vector big data
  • A method and terminal for rapid display of vector big data
  • A method and terminal for rapid display of vector big data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Please refer to figure 1 , a method for rapid display of vector big data, including:

[0080] S1, establish a pyramid classification for the vector data source, obtain the vector data after classification, each classification corresponds to a different pixel resolution, and the vector data source includes linear graphics or plane graphics;

[0081] Among them, the vector pyramid is a technology that converts vector data sources to obtain multiple data sources of different levels with different data volumes according to the display requirements of different scales. The establishment of pyramid grading for vector data sources includes:

[0082] The vector data source is divided into different numbers, the resolution of each partition is the same, and the number of partitions corresponding to different pyramid levels is different.

[0083] Specifically, 23 pyramid levels can be established: set the global latitude and longitude range (-180:180, -90:90), then level 0 corre...

Embodiment 2

[0110] The difference between this embodiment and the first embodiment is that the step S3 includes:

[0111] S31. Divide the thinned vector data source according to the coordinate range of the vector data source, and construct a plurality of block RDDs (Resilient Distributed Datasets), and each block RDD is mapped to a worker worker node;

[0112] For specifics, please refer to figure 2 , When the system is initialized, the original data source d, and the compressed data sources d6 and d7 are divided into multiple partitions according to the total number of cores in the cluster, and the partitioned RDD is constructed on the driver node according to the partition coordinate range. The partitioned RDD requires memory and hard disk support Cache, which can guarantee data traversal performance. A chunked RDD coordinate range is a fraction of the overall RDD coordinate range, mapping each chunked RDD to a worker node. At this time, the image rendered on the worker node is part ...

Embodiment 3

[0121] Please refer to image 3 , a terminal 1 for rapid display of vector big data, comprising a memory 2, a processor 3 and a computer program stored in the memory 2 and running on the processor 3, and the processor 3 implements the implementation when the computer program is executed. Each step of Example 1 or Example 2.

[0122] To sum up, the present invention provides a method and terminal for rapid display of vector big data. During the whole process of rapid display of vector big data, a vector pyramid is established through vector compression technology, distributed parallel technology is used, and linear graphics are used. Or the size of the circumscribed rectangle of the surface graphics to thin the vector data, build multiple RDD blocks according to the thinned vector data and perform distributed parallel rendering, so as to realize the whole image display without affecting the overall layer. The display effect also plays the role of vector compression, and at the...

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Abstract

The invention discloses a method and a terminal for rapid display of vector big data. Pyramid classification is established for vector data sources to obtain vector data after classification. Each classification corresponds to different pixel resolutions. The vector data sources include linear graphics or Planar graphics; thinning the graded vector data according to the size of the circumscribed rectangle of the linear graphics or the planar graphics and the pixel resolution of each grade to obtain thinned vector data; according to the The thinned vector data is displayed with different pyramid levels of vector data; it realizes the rapid display of vector big data graphics, reduces the amount of data requested for small-scale display, and the thinning effect meets the needs of the display data volume and reduces preprocessing time. to improve display performance. Solve problems such as long preprocessing time, inability to dynamically modify display styles, limited display data volume and performance at one time. Can dynamically and quickly display vector big data.

Description

technical field [0001] The invention relates to the field of graphic display, in particular to a method and a terminal for rapid display of vector big data. Background technique [0002] In the informatization construction of various fields at the national level, especially in the development and construction of the national land basic spatial information platform, the data volume of a professional layer, such as the national basic farmland map data, can often reach tens of millions or even more than 100 million records. . The rapid display of vector big data of linear graphics and surface graphics is a basic requirement and a difficult technology. Existing solutions include: [0003] 1. Grid tile technology [0004] The grid tile technology saves the time of vector data reading and rendering by establishing multiple levels of tiles with different scales and pixel resolutions in advance, and achieves the purpose of quickly responding to user display requests. [0005] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/54G06F16/56G06F16/583
CPCG06F16/54G06F16/56G06F16/583
Inventor 于雷易杨永明彭清新
Owner FUZHOU TELEWARE ELECTRONICS
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