A hierarchical object oriented method for land cover classification of SPOT 5 imagery

  • Authors:
  • Wei Su;Chao Zhang;Xiang Zhu;Daoliang Li

  • Affiliations:
  • College of Information #x0026/ Electrical Engineering, China Agricultural University, Beijing;College of Information #x0026/ Electrical Engineering, China Agricultural University, Beijing;College of Information #x0026/ Electrical Engineering, China Agricultural University, Beijing;College of Information #x0026/ Electrical Engineering, China Agricultural University, Beijing

  • Venue:
  • WSEAS Transactions on Information Science and Applications
  • Year:
  • 2009

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Abstract

Land cover classification with a high accuracy is necessary, especially in waste dump area, accurate land cover information is very important to eco-environment research, vegetation condition study and soil recovery destination. Funded by the international cooperation project Novel Indicator Technologies for Minesite Rehabilitation and sustainable development, a hierarchical object oriented land cover classification is produced in this study. The ample spectral information, textural information, structure and shape information of high resolution SPOT 5 imagery are used synthetically in this method. There are two steps in object oriented information extraction: image segmentation and classification. First, the image is segmented using chessboard segmentation and multi-resolution segmentation method. Second, NDVI is used to distinguish vegetation and non-vegetation; vegetation is classified as high density vegetation, middling density vegetation and low density vegetation using spectral information, object oriented image texture analysis; non-vegetation is classified as vacant land and main road using length/width. Accuracy assessment indicate that this hierarchical method can be used to do land cover classification in waste dump area, the total accuracy increases to 86.53%, and Kappa coefficient increases to 0.7907.