| Regional geological survey is the basic and public welfare geological work, has been played a very important role in various fields of national economy. With the rapid development of information technology and spatial database technology, digital method in regional geological survey work has been widely used. Using this technique can better achieve geological information sharing and data updating,maintenance in different fields.Improving the quality and efficiency of geological work.In recent years, the domestic digital geological mapping work has gradually popularized in the geological work. But there are still some deficiencies in the system design and ease of operation. This point affects the quality and efficiency of the geological mapping work,and is not conducive to the development and popularization of the digital geological mapping. This paper summarizes the practical experience of 1:50000 regional geological survey project in Zhan Bei Cun Heilongjiang Province.Combining with systems theory and working methods of digital geological mapping.Analyzing and summarizing the operating procedures and FAQ in geological field data collection,data collation and checking,1:50000 geological database building these three part of the mapping process. Discussing and analysing the causes of these problems. And giving the solutions. Specific analyzing the the PRB process in digital geological mapping work,PRB dictionary database design and partial data table structure suitable geological features of the region,geological map space database construction method,data precision control,sectional automatic generation and other issues. On the geological map database construction. Using spatial database construction method of digital mapping system.Studying and solving automatically assigning values to feature class, the spatial data of feature class automatically inherits,the input of attribute data and other problems in the process of building a database.According to the 1: 50000 regional geological map space database standards and implementation rules.Constructing the 1: 50000 Zhan Beicun geological map space database, attribute database and metabase.Studying the practical problems in the process of building a database.The digital geological mapping technology has great advantages over the traditional method of regulated mapping. But there are some defects.Combining with geological database building project,this paper discusses data quality control methods and generating the measured cross-sectional view and other issues. To explore these issues can be used as reference by geological mapping staff. In order to improve efficiency in the future digital geological mapping process. Providing a guarantee for high-quality completing digital geological mapping work. |
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