Optimization Methods and Application of Triple Index Bare Soil Information Extraction
Rapid,accurate and brief extraction of the bare soil information has the significant meaning to the high efficient monitoring of soil loss status and scientific development of soil conservation.The Changting County was selected as the test area for the construction of the remote sensing extraction method for triple index bare soil information.The bare soil index BI was selected for preliminary extraction of bare soil information,and then the vertical impermeable surface index PISI and normalized building index NDBI* were used to remove mixed construction land in the bare soil.The results of application of triple index method in Changting County showed that:(1)the bare soil area was reduced from 128.61 km2 in 2016 to 102.22 km2 in 2022,reflecting the good effects of soil conservation in Changting County;(2)triple index method is simple in operation with good effect in the separation of the bare soil and construction land information.The total extraction accuracy was above 96％,and the Kappa coefficient was greater than 0.89.
万方数据
维普
