基于GIS的岷江上游聚落易损性评价数据库的设计与实现

The Database Design and Implement of Vulnerability Assessment of Upper Reaches of Min River Based on GIS

针对在区域易损性评价中广域数据库提供数据量较少、数据精度较低以及专题图出图步骤复杂的问题,通过数据模型的选取以及新数据库框架的应用对其进行改善。选取区域易损性评价模型为主,结合Geo Database模型为该数据库的数据模型,并使用Arc Catalog对数据库进行有效管理。该数据库框架主要由原始数据库与成果数据库两个子库构成,原始数据库存储原始采集数据,并具有数据备份功能,成果数据库存储分析处理后的成果数据。以岷江上游作为研究区,在该数据库的辅助下进行专题地图制作,结果表明,岷江上游山区聚落易损性评价数据库完整保存了易损性评价因子数据,提高了区域易损性评价效率与精度,简化了专题地图制图步骤,提升了专题地图出图效率。该数据库的应用,可为岷江上游山区的可持续发展提供有效技术支撑。

According to the fact that the database of wide-area provides small amounts of data and Low Accuracy Data and Thematic map drawing complex step. Through the selection of data model and the ap-plication of a new database framework to improve it. The database ’s data model is focused on regional vulnerability assessment model,combined with GeoDatabase model. The ArcCatalog was used to manage the database. The database structure was composed by the original database and the results database. The original database saves the original data,and has the function of data backup;The results database saves the result data of finishing data analysis process;Finally,the thematic maps was finished by using the da-tabase in the study area of the upper reaches of Min River. The results show that the database of vulnera-bility assessment for the mountains of the upper reaches of Min River is able to preserve the factor data of the vulnerability assessment,to improve the efficiency and precision of the regional vulnerability assess-ment in the study area,and tosimplify the thematic mapping procedures,improve the efficiency of themat-ic mapping. The database could provide effective technical support to the sustainable development of the upper reaches of Min River.