关键词: 区域地震构造图, 西南地区, 数据库, MapInfo

Abstract: The assessment of regional seismotectonic environment is very important for seismic safety evaluation of engineering sites, and it is essential to compile a regional seismotectonic map for the region where engineering site is. For reusing the work products of seismic safety evaluations in past years and lessening repetitive hard work, it is a valuable work to build a database of regional seismotectonic map for regions where a number of seismic safety evaluation of engineering sites have been accomplished.In the past few years, we have accomplished many projects of seismic safety evaluation of engineering sites in southwest China. Combining with the work of other groups, it is possible to build the database of regional seismotectonic map in southwest China.As a useful desktop mapping software and GIS, MapInfo provides a powerful solution for mapping geographic information. It is selected as the platform to build our database. In database design of GIS, the spatial information and attribute information are usually separated considering the large quantity of data, efficiency and convenience in analysis and query of spatial information. Separate design of spatial database and attribute database is also convenient for extension and share of database. For meeting the requirement of seismic safety evaluation code, the regional seismotectonic map must include: 1) age, type and kinetic characteristic of faults in Qh; 2) active fault segment; 3) range and sediment thickness of active basin in Qh; 4) characteristic of modern tectonic stress field; 5) the epicenter distribution of earthquakes M≥4³/₄. This decides that the database of regional seismotectonic map is composed of multiple layers, multiple basic types and multiple relational tables.The database of regional seismotectonic map of southwest China on MapInfo platform is built by using the separate design of spatial database and attribute database with the structure of multiple layers, multiple data types and multiple relational tables; and basic function of the database and output method of regional seismotectonic map is showed in the end.

Key words: regional seismotectonic map, Southwest China, database, MapInfo