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Research on the Construction of Geographic Spatial Information Multi-Grid

Author: NiuXingGuang
Tutor: LvXiaoHua
School: PLA Information Engineering University
Course: Cartography and Geographic Information Engineering
Keywords: Grid The geographic information grid Meshing Trellis-coded Map projection
CLC: P208
Type: Master's thesis
Year: 2008
Downloads: 51
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Abstract


-Phase combined with of the to the by the the the of grid technology and space of information technology geographic space information grid will be is expected to to in the the the of the geographic of the global - oriented space data to acquire, process , the the shared with the service of , and , etc. aspects of to obtain a new breakthrough in , its broad application prospects so that it become the the the current domestic of the research hot spot of of the outside the . The the multi - -class grid of the spatial information build is the the data structure of the to adapt to the of grid technology of the global geographic space , data organizations , data expression of , the data retrieval of the theory the basis of and key technologies . The the main work of of the thesis are are as follows : 1 , at home and abroad typical of the geographic information meshing method dissect . A brief introduces the of the the grid historical origins ; analysis of a based on the grid in the of the cities Fang li the of the flat-screen , of the United States reference system of the Military Grid (MGRS), weft flat-screen global discrete grid , and the grid of the based on the ellipsoid spherical surface ( spherical surface ) of the latitude and longitude lines , regular polyhedron of the the establishment of method of of the grid . 2 , the multi - -class grid of the geographic spatial information build . Based on the the the the of the characteristics of with the the status quo of of the data of the of our country's space , expounded the of the basic the principle of of of the our country geographic information multi-level grid the establishment of , put forward a the divided method of the -oriented the of the latitude and longitude lines of the global grid : based on 6 ° × 4 °, 6 ° × 6 ° latitude and longitude lines divided with the encoding method ; in based on with 6 ° × 6 ° of the the area of ??threshold value of the the the divided with the encoding of of the latitude and longitude lines method . 3 , the the the the the the the choice of of the the global map projection with the the the design under the the in the grid environment . Select the with the the designed a adapt to the the the multi-level grid of the geographic information , -oriented the global dynamic data model the establishment of , there are conducive to the the map projection displayed by the global integration : checkered projection , perspective the Cylindrical projection , the the azimuth projection and its the projection a combination of application of . 4, . The experimental system the establishment of the . Adopt the the The VC and OpenGL -phase the method of combining , the development of a the of the experimental system the establishment of by the geographic information multi - -class grid , to achieve a a multi - -class meshing , and grid encoding conversion , global LOD display , the the the the validation of the global integration projection with the the visualization expression of . In the the aspects of of global projection , etc. as the the of the select with the design of of in the the the multi-level meshing of the geographic spatial information , The encoding as well as an under the the grid environment of , the thesis carried out a the useful exploration and the a certain degree of the innovation , the results of of its research is has good the establishment of on the the of China ' s geographic space information grid of the guiding role in .

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > General issues > Mapping database and information system
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