10aa9ac3-1433-11e9-a8fa-a0481ca9e724 dataset Data infodesk ISRIC - World Soil Information data@isric.org 2022-01-14T08:41:30 ISO 19115:2003/19139 2003/Cor.1:2006 32736 EPSG Topsoil organic carbon concentrations and stocks for Tanzania 2019-03-01 10aa9ac3-1433-11e9-a8fa-a0481ca9e724 This soil organic carbon dataset contains the following maps: soil organic carbon concentration (%) for the 0-10 cm, 10-20 cm, 20-30 cm and 0-30 cm soil layers, and bulk density (kg/m3) and soil organic carbon stock (kg/m2) for the 0-30 cm layer. These maps were produced with (geostatistical) regression-kriging models that combined soil data from the NAFORMA survey, the Tanzania National Soil Survey and the African Soil Profiles Database Version 1.1 with a suite of environmental GIS data layers including a land cover map, SOTER soil class map, maps of topographic attributes derived from the SRTM-DEM, maps of surface reflectance and vegetation indices derived from satellite imagery. The regression-kriging models were used to predict carbon concentrations, stocks and bulk density at the nodes of a regular grid with 250 meter cell size covering the Tanzania. Prediction uncertainty was quantified and is available with the data as the lower and upper boundary of the 90% prediction interval. Further details about the input data, modelling framework, and cross validation results are provided in a peer-reviewed, scientific journal article. The project was funded by the UN-REDD Programme Output 2.4 “National Maps inform delivery of the REDD+ Framework” and conducted through a letter of Agreement between Food and Agricultural Organization of the United Nations (FAO) and ISRIC-World Soil Information. The maps were produced by ISRIC - World Soil Information in a collaborative effort with the National Soil Survey, Ministry of Natural Resources and Tourism, Tanzania Forest Services, Sokoine University, and the AfSIS project. Bas Kempen ISRIC - World Soil Information Soil mapping specialist PO Box 353 Wageningen 6700AJ Netherlands bas.kempen@wur.nl digital soil mapping organic carbon Soil science Stratum Africa United Republic of Tanzania Region Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0), https://creativecommons.org/licenses/by-nc-sa/4.0/ 250 geoscientificInformation 9999-01-01 2013-12-31 29.60 40.50 -12.00 -1.00 GTiff https://files.isric.org/public/TZ_SOC/ WWW:LINK-1.0-http--related Download https://www.isric.org/projects/carbon-mapping-tanzania WWW:LINK-1.0-http--related Project webpage https://www.sciencedirect.com/science/article/pii/S0016706118305111?via%3Dihub WWW:LINK-1.0-http--related Report Kempen, B. et al. (2019). Mapping topsoil organic carbon concentrations and stocks for Tanzania. Geoderma 337. - ISSN 0016-7061 - p. 164 - 180. https://www.sciencedirect.com/science/article/pii/S0016706118305111?via%3Dihub