Theory And Practice Of Geologic Map Spatial Database Establishment Of 1:250,000

Set up a nationwide geological map that can draw,meet different levels user's needs,can bring in constant renewal in at will and geologic map database,facilitate,realize national range space geographical sharing of information,can advance rapid development of information,intensive society and reduce a large number of GIS repeated input of industry,offer the important basic information material of the geological part for "digital earth" too.1:250,000 Regional Geologic Map Spatial Database are important components of the national basic database of geological survey,resource appraise and relevant research work adopt information offer solid data foundation,will serive for employing offering in social public service.This thesis rounds the basic principle of 1:250,000 database establishment,combine geographical information systems soft ware MAPGIS and figure fill out,pursue Digital Geological Mapping System(RGMAP) in 1:250,000 map database application of the project,implement respects such as the route,etc.and carry on overall,more systematic research from the technological method to build storehouse,and synthesis,upgrade,build storehouse integrate,make the more complete,more practical one: Comprehensive tactics of 1:250,000 map databases.The main contents are as follows:1.Through concept information model,logic data model and physical data analysis and study foundation obtain the model modeling method of the data of model,have set up the geologic map space data model composed of 15 basic key elements,8 comprehensive key elements,12 targets,provide geologic map entity,entity connection and relevant semanteme restrain regular formalization from describe, stipulate to the data model the content,structure,behavior and semanteme of the data are described.2.Study the granularity of space,describe the granularity of granularity,semanteme,interreaction which stores the granularity and cut apart technology,through the organization of the data model,solve the structural ways and relations of key element and target,have realized the geologic map data model that has nothing to do with the scale.3.Use with figure filling out space database to pursue system integration build storehouse tool,have studied and solved space data and attribute data inheriting real material picture key elements automatically, key element,target data entry,give key element type compose ID value practical problem of course automatically.4.Study 1:250,000 digitized geologic map in there is attribute and there is no attribute cases,and 1: 250,000 digital geologic map one's own building the procedure of the storehouse,solves a series of problems built in the course of the storehouse.5.According to 1:250,000 regional Geologic map spatial Database establishment technical requirements and implementing regulations,build 1:250,000 Beacon Hill pieces of geologic map space database,attribute database and yuans of database,study and solve a series of practical problems built in the course of the storehouse.