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《Journal of Soil and Water Conservation》 1989-01
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A LAND RESOURCE INFORMATION SYSTEM——A Iand evaluation case study in Yan'an District

Bojie Fu (Department Of Geography,Beijing University) Donald A.Davidson (Department of Environmental Science,University of Stirling, U.K.)  
A land resource information system involves retrieval, storage, analysis, manipulation and display of spatial data. It is a special type of geographical information system, with a data base on soil, landform, landscape and land use attributes. Such a system is designed to assist land use planning and management. This paper describes a particular land resource information system which was developed for land evaluation to aid land use planning. The structure of a data bank for land resource information systems can normally take one of two forms: the raster format and the polygon format. By using the raster format, a study area of 625 km~2 was selected in Van'an District in the loess plateau. For each component 5 by 5 km grid cell, data on elevation, landform, soil, soil erosion, soil organic matter content, slope, vegetation types, land types and Iand use were extracted from published sources. Data were stored by grid squares and these data, along with records of soil survey, were the basis of a computer mapping system which was used to produce single-factor and integrated land resource assessment maps. The greatest advantages of the land resource information sysLem developed in this project are simplicity, flexibility and low cost. It can be developed for assessment of soil erosion risk and environmental impact assessment after the input of relevant data on physical, social and economic factors. This system is demonstrated for Yan'an district and the results indicate the potential for land use planning and Jand management.
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