Space data network progressive transmission method and system
A technology of spatial data and transmission method, applied in the field of spatial information, can solve the problems of waste of resources, the problem of not considering the scale of spatial data, and the client's inability to control the data transmission process, so as to improve network transmission efficiency, improve effective utilization, avoid The effect of repeated transmissions
Active Publication Date: 2015-04-01
AEROSPACE INFORMATION RES INST CAS +1
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Problems solved by technology
In this process, the scale of spatial data is not considered, and only a single scale of data is maintained, resulting in the client only being able to obtain data with unique precision, including some "useless" data, resulting in waste of resources. At the same time, the client cannot To control the process of data transmission, it can only passively accept the data transmitted by the server, without realizing the interaction between the client and the server
Therefore, the current data transmission mechanism based on the simple "request-response" mode cannot meet the user-driven, active, and interactive requirements of vector data progressive transmission in terms of transmission control and transmission data structure.
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[0024] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0025] method embodiment
[0026] figure 1 It is a flow chart of Embodiment 1 of the spatial data network progressive transmission method of the present invention. Such as figure 1 As shown, this embodiment includes:
[0027] Step S102: The client sends a request for contour space data to the server, and receives the contour space data returned by the server; for details, see image 3 explanation of
[0028] Step S104: When the client determines that the contour space data does not meet the display accuracy requirements, it sends a request for incremental space data to the server, and receives the incremental space data including integrated reconstruction inform...
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The invention provides a space data network progressive transmission method and a system. The method comprises the following steps that: a client transmits an outline space data request to a server and receives outline space data returned by the server; when the outline space data is judged not to satisfy the display precision requirement, the client transmits an increment space data request to the server and receives increment space data which is returned by the server and contains integrated reconstruction information as well as executing the integrated reconstruction operation of the outline space data and the increment space data. Due to the adoption of the method and the system, the waste of the transmission resource and the calculation resource can be avoided, and the repeated transmission of data can also be avoided, so the valid utilization rate of a network bandwidth can be improved, and the valid network transmission efficiency of the space data can be further improved.
Description
technical field [0001] The invention relates to the technical field of spatial information, in particular to a method and system for progressive transmission of spatial data network. Background technique [0002] With the advancement of spatial data acquisition methods, the continuous accumulation of spatial data, and the improvement of application requirements for spatial data accuracy, the amount of spatial data to be processed by application systems has skyrocketed. Therefore, the contradiction between the network transmission of massive spatial data and the limited network bandwidth is becoming more and more prominent. How to effectively transmit massive and high-precision vector data under the limited network bandwidth is an important problem faced by the current cyberspace information system. question. Spatial data is mainly divided into vector data and raster data. The biggest difference between vector data and raster data is that vector data has complex topological ...
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IPC IPC(8): H04L29/06
Inventor 任应超杨崇俊乔丽
Owner AEROSPACE INFORMATION RES INST CAS