Progress in the construction of the spatial database of the 1∶1 million Geological Map of China

Abstract：The construction of the geological map spatial databases has great significance for the fast renewing of basic geological maps, sharing of information resources and study of basic geoscience. The 1∶1 million geological map database (2005 edition) was constructed on the basis of the 1∶500,000 geological map database. The 1∶1 million Geological Map Spatial Database of China was built with the softwares such as MapGIS, ArcGIS and Access and by absorbing fully the latest information and outcomes of 1∶250,000 and 1∶50,000 geological surveys and using the most advanced geoscience theories, modern information technology and advanced cartographic theories. The databases include the geographical map database, geological map database, metadata base and rock/strata database, with a data quantity of 1.6 GB. The spatial database management system possesses strong functions of map retrieval and inquiry, automatic map making and automatic legend drawing.