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

GMLGIS key technical problems

Author HanLiQin
Tutor LanXiaoJi
School Jiangxi University of Technology
Course Cartography and Geographic Information Systems
Keywords GML GMLGIS Geometric data model Data model Data sharing
CLC P208
Type Master's thesis
Year 2010
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The GML as de facto spatial data encoding , transmission , storage, and publishing international standards , increasingly the GIS industry's concerns , it highlights the advantages of geographic information sharing and exchange for a majority of researchers generally agree . Existing GIS software and data format of GML to provide direct support , therefore , the data recipient need the GML conversion to its own data format related operations , resulting in a secondary data conversion , data sharing lead again difficult. To GML application technology research and profiling based on the internal logic of relations between each the GML application of technology , the technical modules were designed in order to build the integration of the GML data processing platform , to ensure the internal integrity of the technical modules unity. Parsing component using DOM technology designed GML to create GML parsing mechanism . Extended quadtree - based thinking , design GML index components , create a GML indexing mechanism . With data rendering component of GDI drawing , design space , to create GML graphics rendering mechanism . Reference spatial data analysis component of the open source software under the premise of the above technologies , the development of the operating GML function modules , to this point , an organic system with open source characteristics of the system from the ground up to support GML . GML parsing , indexing , rendering technical studies, the initial formation of of the GMLGIS data manipulation engine , the organic integration of the various components were well clear of the role played by the various parts of the entire system . GML spatial data editing , query , analysis, design of functional modules , the system has been improved . GMLGIS eventually achieve efficient seamless sharing of spatial data to provide a approach the GMLGIS traditional GIS integration with the existing technical advantages of promote the GML technical applications in depth , real GML - based spatial data sharing can be achieved .

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