Spatial Data Storage, Retrieval And Visualization Research

Spatial Database is the core of GIS, how to manage the spatial data effectively is always a hot topic. Because of the particularity of spatial data, the traditional spatial data management methods couldn't deal with spatial data and attribute data at the same time effectively. And spatial data has not uniform code for a long time and it cause the difficulties to share and interoperate via Internet. As GIS is making for the network, this problem becomes more imminent.The system model based on the idea of open and implement in this paper does effectively make it, by following a series of standards set by OGC, and applying XML to design its (the spatial database) storage, index, and visualization.This research originates from an issue spontaneously developed. This issue will be applied to the city's public facilitates' information management. The part of its spatial data's storage and query is designed with the help of the system model to be mentioned in this paper.First of all, we make a study of spatial data and spatial database theory and advance a spatial data design programe based on GML. GML data storage programe turns up after two testings (comparison between XML data's storage and index function in the object-relationship database). Then, owing to the study to traditional spatial index, a new method: spatial data extension index is raised. Because of its extension attribute concluded from the implement, word-separation technique in Chinese is implemented to spatial object index. And this is feasible to make extension index more effective.At the end of this paper, GIS's visualization based on SVG is studied and mutual-operation pattern is organized.