Nonlinear regression models to identify functional forms of deforestation in East Asia

Shojiro Tanaka, Ryuei Nishii

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Identification of the factors involved in deforestation could lead to a comprehensive understanding of deforestation on a broad scale, as well as prediction capability. In this paper, regression models with two explanatory variableshuman population and relief energy, i.e., the difference between the maximum and minimum altitudes in a sampled areawere verified as to whether they could elucidate aspects of deforestation. The functional forms of the nonlinear regression models were estimated by step functions analyzed with the use of high-precision Japanese data. Candidate smooth regression models were then derived from the obtained sigmoidal shapes by the step functions. Models with spatially dependent errors were also developed. Akaike's information criterion was used to evaluate the models on four data sets for the East Asia region. From the evaluation, we selected the best three models that systematically showed the best relative appropriateness to the real data.

Original languageEnglish
Article number4895355
Pages (from-to)2617-2626
Number of pages10
JournalIEEE Transactions on Geoscience and Remote Sensing
Issue number8
Publication statusPublished - Aug 2009

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • General Earth and Planetary Sciences


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