期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2000
卷号：XXXIII Part B7(/1-4)
页码：1512-1517
出版社：Copernicus Publications
摘要：This work is part of a project to characterise the physical environment of Lavras county in the state of Minas Gerais in Brazil, and to develop a digital database that could be used not only by researchers but also by the local administration and community for environmental planning. The county territory was divided into 5 main watersheds which were taken as the basic geographical domains. The first study area selected was the watershed of the Ribeir.o Vermelho, which is a tributary of the main river of the region, the Rio Grande, and runs along the northern side of Lavras, constituting the drainage channel of this part of the city. The data was obtained by compilation of secondary information, interpretation of aerial photographs and satellite image and complementary field survey. A geographical information system was used to integrate and model the data from different sources. A geomorphopedologic model was used to map the main soil classes. Land cover/land use patterns from 1971 and 1997 were also mapped. The analysis of these maps showed that the principal occupation is agriculture but the main land use types, which include grassland and annual crops did not show significant changes from 1971 to 1997. The most significant changes were observed in the coffee area followed by the area reforested with eucalyptus, natural forest and urban area
关键词：GIS; Land Use/Land Cover; Resources; Spatial Databases; Watershed
