Land Use/Cover Change Detection Based on Span of Land Use Map
Based on the analysis and summarizations of researched home and aboard,the dissertation focused on Land Use/Cover Change Detection Using Feature Database of basic types Based on Land Use span,which belongs to Feature class of LUCC.It should be pointed out that the researches must be focused on the land use spans other then traditional methods of the pixels.The main contributions of the study were summarized as follows:1.Feature extraction based on land use span.The land use span is expressed by vector polygon along with raster region.First the spectrum feature database with histogram,texture and shape feathers of the span is formed.2.Foundation and update of feature database.In detail,firstly,by means of the sample spans according to land use map in time T1,the features of each type of the land use classes are obtained in time T1.Secondly,each sample are analyzed,if the index of regional similarity between the image spans of T1 and T2 is accepted,the samples in time T2 could be remained,otherwise the new samples around that sample are selected and are judged by the similarity between the samples of T1.3.Change detection based on spans and feature database.Each spans of T2 will be classified according to the minimum Euclidean distance to the T2 sample spans accepted,and the corresponding land use type will be assigned to the current span.4.Change information is extraction automatically based on Boolean operations.After classifications have been performed,the changed spans were vectored,then the change information can be statistic through the different Boolean operations in GIS,and various change analysis can be made (I.e.Urbanization and loss of the stew).The method is tested on the Quick Bird images of a district in Wuhan and the precision of the results is high as 85.7％ (in loss of the stew) and 92.6％ (in urbanization).
Land use span Sample span Index of regional similarity Feature extraction wavelet transformation Feature database LUCC change detection
Zhang Hong Shu Ning
School of Remote Sensing and Information Engineering,Wuhan University,129 Luoyu Road,Wuhan,430079
国际会议
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)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）