50results about How to "Clear layers" patented technology

The invention discloses a land utilization/coverage classification method for water and soil loss monitoring in northern soil and stone mountainous areas. The method is based on a high-resolution remote sensing image and medium-scale topographic map data. A layered division extraction method is adopted; layer-by-layer control, layer by layer refinement, a quantitative and qualitative combined method are adopted to carry out three-level classification on land utilization/coverage; the first class is subjected to combining, calculating and quantitatively dividing through wave band spectrums of high-resolution remote sensing images, the second class and the third class are distinguished by adopting a qualitative classification method which comprises steps of firstly dividing water areas and water conservancy facilities, secondly dividing traffic transportation lands, thirdly dividing town lands and industrial and mining lands, and finally dividing ploughing lands, garden lands, forest lands, grasslands and other lands. The method has outstanding professional characteristics, meets the water and soil loss monitoring requirements, is clear in land utilization classification and layeringand comprehensive in content, improves the soil erosion calculation result quality, effectively evaluates the result precision, and is very necessary for researching and promoting the development ofbasic units for water and soil loss dynamic monitoring.