INDMF Based Regularity Calculation Method and Its Application in the Recognition of Typical Loess Landforms

The topographical morphology of the loess landform on Loess Plateau exhibits remarkable textural features at different spatial scales. However, existing topographic texture analysis studies are usually dominated by statistical characteristics and missing structural characteristics. At same time, there is a lack regularity calculation methods for DEM digital terrain analysis. Taking as study area, method based improved normalized distance matching function (INDMF) proposed applied to classification landform. used in this (INDMF regularity) mainly includes two key steps. Step 1 calculates INDMF sequence value peak valley values data. 2 significant valley, constructs sequences, then obtains using normalised ratio value. experimental results show that has good anti-interference ability can effectively extract main unit. Compared with previous methods, adding (i.e., distinguish hill ridge hilly gully region. For ridge, recognition rates 84.62% 92.86%, respectively. Combined characteristics, structure feature extraction discriminate between areas Plateau.