The Research And Application In Geo-browser Based On P2P File Sharing Technology

Nowadays the information is all This article take source geoscience information browser World Wind as the main object of tudy,the union present mainstream geoscience information browser,the P2P technology has nalyzed the geoscience information browser's system construction and the key technologies horoughly,based on this and has conducted the fundamental research and the technical discussiono G/S this new pattern.Through to G/S,the geoscience information browser as well as the P2P hese three aspect content's union,has studied based on the G/S pattern under the P2P technologyn the geoscience information browser's development the applied research. As the continuous development of social informationlizationTo solve this problem,our Group first studied the definition and the architecture of Digital Earth and Digital Earth platform.and then analyzed the spatial information network access mode-G/S mode.On this basis, compared to the existing mainstream P2P file-sharing technology, two open platform (WPPN, JXTA), an open source project (eMule). Analyze the advantages and disadvantages. Finally, the study of the World Wind source code to find a way to load plug-ins.The Main results of this paper are as follow:1,A method of share Geo-Browser Cache data based on eMule's P2P file sharing technology is put forward.This method can effectively solve the original version of World Wind client can only exist in the data from the central server to download remote sensing data. As NASA center data server in a foreign country, there are many restrictions on the gateway throughput coupled with the upper limit of network bandwidth, causing the domestic users to download too slow, leading to a sense of user experience is poor. This method allows each client to share their own plug-ins via eMule cache data.2,A Concept of Remote sensing data Peer-to-Peer Network is put forward.Each client can make up a Peer-to-Peer Network throught eMule Plugin. to form a peer network of all other points of access can directly communicate with each other, these client which joined this HGPPN can share their own remote sensing data, without going through the central server.3,A method of World Wind Source code optimization is put forward.Since World Wind is an open source project, different developers have different needs based on, developed a number of related functions and their own plug-ins but not everyone needs, and I do is done through the analysis of these plug-ins, stripping We are not associated with plug-ins, to optimize the objective.