The Study And Application Of The Regional Soil And Terrain Digital Database (SOTER)

Based on the space differentia in topography, rock, gradient, parent material and soil, Soil and Terrain Digital Database(SOTER) takes land as the combination of natural entity composed of relief and soil, recognizing the regional land according to terrain, rock, topography, slope, parent material and soil. In this way, the SOTER units can be used as the framework of the saving and using soil and relief information in all kinds of scales. SOTER formulates a suit of regulations with systematization and standardization for the database, including not only the databases about topography and soil, but also climate, landuse, vegetation and reference file assistant databases. SOTER can provide the standardized maps, chart and tables for protection, administration and exploitation of resources and environment. SOTER can be broadly applied in many fields such as the global change appraising, environment evaluation and so on. Currently SOTER has been authorized and become one of hotspots in the studies of soil and sustainable use of land.Backed by the technology of GIS, the study builds Fujian SOTER database in a scale of 1:200000 and Zhangpu SOTER database in a scale of 1:10000, selects and compiles many kinds of thematic maps, such as the relief map, lithology map, gradient map and soil series map, makes terrain, terrain component and soil component three level SOTER units, and sets up corresponding attribute database, as well as climate database, landuse database, reference file database three assistant database. With AVENUE programming language, the two different scales databases are connected.In order to explore the practical use of SORTER, the study uses the SOTER built in scale of 1:10000 as the data resource and the methods of Landscape Ecology and Principle Component Analysis to study the local landuse and soil classification separately. The study provides experiences to build regional SOTER, and has great significance in sustainable utilization and management of regional natural resources.