Statistical texture for contour interval choice of 1:50,000 DEMs

摘要：

How to choose contour interval in different geomorphologic type areas is a challenging job.In the paper a statistical texture method is used to measure the distance between Loess Hillock and Loess Ridge in Loess Plateau,which geomorphologic types are hills.The result shows that when the two areas classified into 25 classes or so with the contour interval 15 and 19 individually,the class separability seems more distinct than less than 25 classes.The results also shows that when the number of class is bigger than 25,the class separability decrease instead of increasing correspondingly.It seems that the too many classes used may produce more details in cost of decreasing class separability.And in the seven statistical variables,the number of polygons is the most stable while the mean grayscale,the standard variation of grayscale are the most sensitive when the contour interval changes.The result indicates that the contour interval mainly influences by elevation and relative relief without more information which being dominant.By aid of an appropriate contour interval,the landform features can be easily extracted and is very helpful in delaminate the topography.

关键词： contour interval statistical texture hill DEMs grayscale class separability

作者: MingLiang LUO Guoan TANG Shijiang YAN Youfu Dong

作者单位: Key laboratory of Virtual Geographic Environment (Nanjing Normal University),Ministry of Education,N Key laboratory of Virtual Geographic Environment (Nanjing Normal University),Ministry of Education,N

会议类型: 国际会议

会议名称: 第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)

会议地点: 广州

会议语种:英文

在线出版日期: 2008-06-28（万方平台首次上网日期，不代表论文的发表时间）