The Study Of2D And3D Collaborative Linkage Arrow Plot Technology Based On Spatial Information Sharing

Full name of GIS is the geographic information system, with the maturing ofrelated theory and technology, as people demand for spatial information technologiesand location-based services increased, pushing gradually towards the popularizationof GIS application, from where, GIS technology has been used in various industriesand fields related to location. Two-dimensional GIS has the advantages ofmacroscopic, simplicity, can quickly abstract out of the environment, is a powerfultwo-dimensional spatial query and analysis, statistics, plotting, and other functions, atwo-dimensional GIS plotting more applied in military combat command system, thereal-time and collaborative haven’t well. Visible, the traditional two-dimensional GISplotting application effect is not good in terms of visual expression, however,two-dimensional GIS can’t give a person with sense of reality, stereo feeling, thuspromoting the people continuously explore of three-dimensional GIS.Three-dimensional GIS is more close to the human visual habits, can show morespatial relations, makes up the many defects of the two-dimensional GIS. But for now,the research and application of three-dimensional GIS is still in the initial stage ofdevelopment. In foreign countries, they have introduced a few has mature technologyand widely used three-dimensional GIS platform, such as Google Earth, NASA WorldWind, Skyline, ERSI ArcGlobl, etc. But the plot is still in the application of simpleplot on these platforms, for complex arrow plot is rarely used. Due to the spatialinformation data management and data sharing, the problems of collaborative andinteractive of two-dimensional and three-dimensional are still poor.Throughout the application of3d plotting, also found the following problems:1) Two-dimensional and three-dimensional have not unified plot icon library.2) The reflectingof collaborative plotting is insufficient, plot analysis andprocessing functions are shortcomings.3)Thealgorithm of three-dimensional plotting terrain matching remains to beimproved.4) Two-dimensional and three-dimensional correlation is poor.In view of the above shortcomings, this paper put forward the innovation point, adata sharing and collaborative model of two-dimensional andthree-dimensionallinkage arrow plot method.1) Architecture was based on the data of core, can realize the data sharing andexchange between multiple system, HGML is put forward by G/S model, which canrealize massive, heterogeneous data storage, organization and scheduling.2) Based on the HGML collaborative model, in order to achieve the function oftwo-dimensional andthree dimensional together.3) Based on the collaborative model forthe linkage of two-dimensionalandthree-dimensional plotting, in order to realize the two-dimensionalandthree-dimensional coordination of the plot.This paper studies the main content is as follows:1) Based on the HGML, plot symbol library is designed, both two-dimensionaland three-dimensional scene can plot arrow symbolin real-time.Based on the unified data exchange standard (HGML), using it we can unifiedmanagement vector space information data, and build complex arrows, amplify andstretcharrows, and other functionsof plotting symbols library.When study two-dimensional arrow plot, mainly by "embedded strike" and "dovetail" arrow as anexample to introduce the build processof two-dimensional irregular arrow mark, andthen use the Flex plug-ins invoke plot symbol library to realize the two-dimensionalarrow mark plotting.When research on the three-dimensional arrow plot;firstly,introduced the principle of drawing the three-dimensional arrows mark;Secondly, introduced the plottingof three-dimensional model plotting symbols,three-dimensional regular vector plotting symbols, three-dimensional irregularplotting symbols; Thirdly, introduced the terrain matchingbetween thethree-dimensional model plotting symbols and irregular three-dimensional plottingsymbols.2)Building a two-dimensional andthree-dimensionalcollaborative model basedon HGML.The main line of HGML For data registration and data exchange mechanismisbased on XML. Through the service mechanism of the huge amounts of datamanagement and client aggregation cloud services,solve the bottleneck problems ofthe storage management, service response, the network bandwidth, informationexpression, operation control, technology and analysis effectively, then build a two-dimensional andthree-dimensional collaborative model based on HGML, this modelcan solve the problem of two-dimensional andthree-dimensional plotting togethereffectively. This model include collaborative management, storage and analysis forHGML file, meeting management, protocol, collaborative services and collaborativeinteraction six modules, these modulesmust be a total, to guarantee the real-timecollaborative plotting, timeliness and correctness.3) Building a linkagecommunication framework of two-dimensional andthree-dimensionalbased on the collaborative model. The linkage communication framework of two-dimensional andthree-dimensional based on the collaborative model combine the construction of acollaborative model, message transformation and push technology. This frameworkcan be divided into the request, coordination, processing, data display, messagetransformation, push six process. Through The linkage communication framework oftwo-dimensional and three-dimensional based on the collaborative modelcan realizetwo-dimensional and three-dimensionalcommunicationinteractivelybetweentwo-dimensionalGIS and three-dimensional GIS.4) Building a linkagedisplay framework of two-dimensionalandthree-dimensionalfor plotting based on the collaborative model.The linkagedisplay framework of two-dimensional andthree-dimensional forplotting based on the collaborative modelis mainly composed of collaborative model,plot symbols library, information analysis and processing, operation control, two-dimensional andthree-dimensional display, input and output modules.Based on thecollaborative model, this framework can realize two-dimensional sceneorthree-dimensional scene leading the linkage of two-dimensional andthree-dimensionalinteractive plotting. When plot in three-dimensional scene, the arrow symbol cansynchronously displayed at the same position which has the same longitude andlatitude in two-dimensional scene, and vice versa.Through the investigation and research above, this paper build a two-dimensionaland three-dimensional collaborative model based on HGML, and then realize themulti-terminalcollaborative forthe linkage of two-dimensional andthree-dimensionalplotting.1) By using the meeting mode and HGML,combing the cooperative principlewith technical background, build a two-dimensional and three-dimensionalcollaborative model based on HGML.2) By integrating the linkage communication model of two-dimensional andthree-dimensional and multi-terminalcollaborative model, build a linkagedisplayframework of two-dimensional andthree-dimensional for plotting, and realizetwo-dimensional scene or three-dimensional scene leading the linkage oftwo-dimensional andthree-dimensional interactive plotting.