The Spatial Attribute Classification Of The Earth's Surface And Analysis Of Typical Ecotone On The South Of NSTEC

The vegetation type was classified in the East Transect by unsupervised classification using the data( IkmX 1km) from NOAA meteorology satellite from 1995-1996,and the article analyzed the change of NDVI of all kinds of vegetation types,in the same time analyzed the forest dynamics in typical ecotone (warm temperate zone to semitropical in Qinling woods) using the higher spatial resolution TM data.The East Transect was classified thirty five vegetation types using NDVI data from 1995-1996 by GIS technique. The paper concludes that the NDVI from meteorological satellite is sensitive indicator of vegetation growing condition,times series curves of NDVI can truly curve vegetation growing principle by drawing the seasonal change curve of NDVI data by three groups. The paper also concludes that the forest's NDVI curve is commonly single apex,while farmland's or shrub's curve is mostly double apex,the peak value of forest's NDVI is commonly higher than grassland,farmland and some other vegetation types. The paper concludes that the changing rate of NDVI of rain forest in tropic is the smallest,the changing curve is smooth ,while the changing rate of NDVI of the deciduous broad leaf forest in warm-temperate zone is the largest The change of NDVI is the most conspicuous in winter and spring (especially in April) while is not conspicuous in summer and autumn by analyzing the change of NDVI along latitude using the NDVI value of different vegetation types along the same longitude .The vegetation index from warm temperate zone to semitropical zone has obvious transition,while other areas have no distinct change by analyzing the change of NDVI from temperate zone to semitropical zone to tropical zone using NDVI averageJn the same time it is concluded that the sink value in the beginning of the year 1995 is from the influence of the monsoon in east of China by analyzing the NDVI curve of several typical needle leaf forests.The relation between NDVI value and temperature is conspicuous while the relation of precipitation is less or not by analyzing the relation between NDVI and temperature and precipitationFinally it can get the conclusion that the change of river area is the smallest,the change of sienna area is the greatest by analyzing two phases of TM data in 1987 and 1997 with RS technic. The area of sienna in 1997 decreased 103271.9 hectares than that in 1987,decreased 82.15% than before. The main causes are the enhancement of government's and people's protection consciousness on forests and enhance the coverage of the forest by strengthen planting. The change of economy forest,farmland and city area is tensely related with economy development. The area of sclerophyllous oaks Sprout Forest decreased 69754 hectares than that in 1987,decreased 28.16% than before. The main cause is destroyed by mankind,the increase in broad-leaf mixed forest and the decrease in needle leaf forest is from the climate change and devastation of mankind.