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Bathymetry from the ETOPO1 Global Relief Model downloaded from: http://www.ngdc.noaa.gov/mgg/global/global.html
Sumatran orangutan distribution shapefile prepared by Singleton and Wich and based on Wich et al. 2008 with unpublished data added.
The suitability of different land systems for various agricultural products taken from the RePPProT (Re-gional Physical Planning Programme for Transmigration) project of the 1980’s. Each land system was assessed as Suitable, Unsuitable, or Unsuitable without inputs for a number of commodities. Landsystems were mapped at a scale of 1:250,000. Land Resource Department/Bina Program, 1988.
Review of Phase I Results from Regional Physical Planning Programme for Transmigration (RePPProT) Land Resources Department, Overseas Development Administration, London, UK; and Direktorat Bina Program, Direktorat Jenderal Penyiapan Pemukiman, Jakarta, Departemen Transmigrasi, Indonesia.
Uploaded on Wednesday 01 Feb 2012
Land not suitable for major agriculture crops
Riccardo Pravettoni, UNEP/GRID-Arendal
An estimated 88% of Sumatran orangutan habitat is on land classiﬁed by Indonesian Government studies (RePPProT) as completely unsuitable for cultivation of major crops such as oil palm, rubber, robusta coffee or cocoa. Only 1.3% of orangutan habitat is deemed ideal for one or more of these crops, while 10.7% could be suitable with signiﬁcant inputs, such as fertilizer and irrigation.