Vector data stream transmission method and system oriented to Web visualization

Abstract

The invention discloses a vector data stream transmission method oriented to Web visualization. According to the method, the transmission sequence of space elements is determined according to the level of importance in vector space element visualization, and the application purpose of on-line and real-time display of vector data is achieved due to the fact the data are transmitted to a client in batches. The method comprises the first step of server vector data stream transmission block organization, the second step of vector data stream transmission based on real-time transmission protocols, and the third step of unpacking and reconstruction of the client vector data, wherein the first step is used for forming a block unit suitable for stream transmission, the second step is used for data reciprocating transmission and quality control, and the third step is used for vector data browser visualization. The invention further provides a vector data stream transmission and visualization system under a Web environment, wherein the system is used for guaranteeing that the method is achieved in actual application. According to the requirement for Web on-line visualization oriented to massive vector data, the experience for browsing the vector data online by Web client users is effectively improved.

Description

technical field [0001] The invention belongs to the field of online visualization of geoscience vector data, and in particular relates to a large-scale geospatial vector data stream transmission method and system for visualization in a network environment. Background technique [0002] With the introduction and development of cloud computing and big data, the capacity and scale of network information storage, transmission and processing have been further improved, and the demand for data visualization and performance requirements have become more urgent. Scientific data is the basis and premise for scientific research and government decision-making. Scientific data visualization is the process of establishing mental models and mental images of things represented by data, showing the perceptibility, interactivity, and scalability of data. [0003] Spatial features are one of the main characteristics that distinguish geoscience data from other scientific data. Spatial visual...

AI Technical Summary

Problems solved by technology

The visual rendering process of vector data is more complicated than that of raster data, especially in the network environment, online visual rendering requires efficient network client rendering technology and methods, and the contradiction between limited network bandwidth and large data volume will lead to transmission response The time is too long, the online rendering process of vector data is delayed, and the client operation waits passively, etc.

[0004] In order to speed up the response time of vector data visualization in the network environment, the vector data is pre-converted to generate a tile map with a pyramid structure, which can improve the efficiency of online visualization of the network. The patent publication number CN101944132A discloses the organization of this tile map And the production method, but the visualization of the tile map is not the visualization of the vector data itself, nor the real-time rendering of the spatial coordinates in the vector data

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