The Application of '3S' Integration Technique in Carrying out the Plan of Environment Rehabilitation and Water and Soil Conservation

摘要

On the base of space information technology, according to the characteristics and demand of the plan of environment rehabilitation and water and soil conservation, the article bring forward the method and approach of carrying out the plan of environment rehabilitation and water and soil conservation by using '3S'(remote sensing, system, geography information system) integration technology. In this integration system, the Global Positioning technology is mostly apply for real time locating, supplement surveying of plot and attribute updating; Remote sensing image treatment technology is mainly apply for the geometry rectification, geometry treatment of remote sensing image data ; Full digital photogrammetry system is apply for the scanning , orientation of the images, and the collection of Digital Terrain Model(DTM); Data collection system is apply for classing by computer, extracting the information of ground coverage and land composition, and status of information of water and soil conservation; GIS will treat graph data which is in vector form, carry out drawing analysis; Authority analyze system is apply for forecasting and carrying out the plan of environment rehabilitation and water and soil conservation, Graph and image export systems apply for the displaying, plotting, printing of multifarious results. The approaches will cover collection and analysis of basic data, setting up the GPS control net in planned area, full digital photograph surveying of representative area, treatment and information collection of remote sensing image, collection of slop and gully density factor, design and management of GIS database, confirmation of plan, design of small scale structure such as silt structure, maps drawing and achievement exporting.