Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Scale Stability Investigation Based on RILBP for Terrain Structure

LI Ke;YAN Shi-jiang;School of Geography Science,Nanjing Normal University;School of Resources and Environmental Engineering,Anhui University;  
The terrain structure describes the morphological features of land surface.Rich and varied landscapes are attributed to the ups and downs of the terrain structure.Generally,the earth surface morphology exhibits different scale features of morphologic similarity at local scale and orderly differentiation at regional scale.Existing studies cannot effectively characterize the scale feature of terrain structure.Thus,the suitable expression scale of topography and stability features of morphological structure are needed to be further explored.In this paper,a series of DEMs which belong to different loess geomorphic types were selected as the source data.And Local Binary Pattern(LBP)was introduced to portray the spatial structure of central position and its neighborhood positions.This paper proceeds from portraying the characteristics of local surface configuration,and sequentially analyzes the distribution feature of LBP of typical loess landform types.A method of Rotation Invariant LBP(RILBP)was used to portray and analyze the landforms in consideration of the one to many relationships between topographic structure and LBPs.In addition,the similarity between the scale samples was measured by calculating the Euclidean distance between the RILBP frequency distribution vectors of the samples.It is found that LBP tends to be stable with the increasing of the analysis scale.Finally,by using a minimum value among the inter-class difference of sample areas as a threshold to divide the Euclidean distance matrices,the stable cell sizes of all sample areas can be obtained.The results show that RILBP can effectively express the terrain structure.Meanwhile,the stable unit of terrain structure can directly reflect the appropriate scale of terrain analysis and it has significant advantages in mining multi-scale topographical information.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved