Abstract
It is known that land-use and land-cover changes paly an essential role in environmental and ecological changes and furthermore contribute to global change.To understand how land use/cover change affects and interacts with earth systems,information is needed on what changes occur,where and when they occur.Despite ongoing research efforts on land-use and landcover patterns,there remains a need for developing basic land-cover datasets to provide quantitative,spatial land-cover information.In terms of land use and related researches,topographical maps have been the important information sources.Based on topographical maps,integrated with graphics method and expert experience,we tried to extract the land use information without the image.In a typical study area,taking the arable land information extraction as sample,precision was tested and the error was less than 5%,which was compared with statistic data and image data.The result showed that rebuilding the land information based on topography is feasible,which can meet the need of cartography and analyze land use on the same or small scale.
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