Object-based forest biomass estimation using Landsat ETM+ in Kampong Thom Province, Cambodia

Tsuyoshi Kajisa, Takuhiko Murakami, Nobuya Mizoue, Neth Top, Shigejiro Yoshida

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


Information about forest biomass distribution is important for sustainable forest management and monitoring fuelwood supply. The objective of this study is to develop an accurate forest biomass map for Kampong Thom Province, Cambodia. We used a new technique (object-based approach) and a conventional technique (pixel-based approach) for the estimation of forest biomass using Landsat Enhanced Thematic Mapper Plus (ETM+). The object-based approach created segments of images, and calculated statistical and textural attributes. Our results showed that estimation accuracy of the object-based approach, with the use of band 1 and an exponential fit, was the best (R2 = 0.76), and this accuracy was comparable to that of the pixel-based approach (R2 = 0.67). Although several textural variables were related to forest biomass, they did not contribute significantly to improvement of estimation accuracy. However, the object-based method can be used for image segmentation so that the image objects are spectrally more homogeneous within individual regions than with their neighbors. Hence, they can be regarded as management units for policy-related spatial decisions. Therefore, it is possible to select either of the two methods depending upon what the situation demands.

Original languageEnglish
Pages (from-to)203-211
Number of pages9
JournalJournal of Forest Research
Issue number4
Publication statusPublished - Jul 2009

All Science Journal Classification (ASJC) codes

  • Forestry


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