A vector data stream transmission method and system for web visualization

Abstract

The invention discloses a web visualization-oriented vector data stream transmission method. This method determines the transmission sequence of spatial elements according to the importance of vector spatial element visualization, and achieves the application purpose of online real-time display of vector data through batch transmission to the client. Including three sub-processes: process 1, server-side vector data stream transmission block organization, used to form a block unit suitable for stream transmission; process 2, vector data stream transmission based on real-time transport protocol, used for data reciprocating transmission and quality control; process three, unpacking and reconstruction of client-side vector data for visualization in a vector data browser. The present invention also provides a vector data stream transmission and visualization system under the network environment, so as to ensure the realization of the above method in practical application. The present invention effectively improves the online browsing experience of network client users for vector data in the face of the network online visualization requirement of large-scale vector data.

Description

Technical field [0001] The invention belongs to the field of online visualization of geoscience vector data, and particularly relates to a large-scale geospatial vector data streaming 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 prerequisite for scientific research and government decision-making. Scientific data visualization is the process of establishing mental models and mental images of the things represented by data, showing the perceptibility, interactivity, and scalability of data. [0003] Spatial feature is one of the main features that distinguishes geoscience data from other scientific data. The spatial visualization of g...

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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