FAO-UNESCO SOIL MAP OF THE WORLD FOR ASIA; GRID VERSION
Entry ID:
GNVd0054_104
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Summary
Abstract:
UNEP/GRID Documentation Summary for Data Set: FAO-Unesco Soil Map of the World; UNEP/GRID 1986 Version. The Global Soils database resident at UNEP/GRID was digitized by the ESRI Corporation in Redlands, California (USA) from the 1974 FAO-Unesco Soil Map of the World at 1:5,000,000 scale. The legend of the Soil Map of the World comprises an estimated 5000 different mapping units, consisting of ... soil units or associations thereof, occurring within the limits of a mappable physiographic unit (Africa alone in three map sheets has a total of 1509 map units). The number of soil unit classes which compose the FAO-Unesco Soil Map of the World legend is 106. In the UNEP/GRID version, this has been increased to 129 to allow the identification of soils where insufficient information existed to specify the dominant soil unit.* Instead, the dominant soil GROUP is identified (e.g., 'Acrisols' when the dominant Acrisols UNIT is not known). When a map unit is not homogeneous, it is composed of a dominant soil and associated soils, with the latter covering at least 20 per cent of a given area. Important soils covering less than 20 per cent of a given area are added as inclusions. The original FAO-Unesco Soil Map of the World, published in a total of 19 map sheets (including the legend), was in the Bipolar Conic Conformal Projection for the Western Hemisphere, and in the Miller Oblated Stereo- graphic Projection for the Eastern Hemisphere. In order to have a global digital data set that was consistent and uniform, the vector-based data files were first rasterized and then re-projected at GRID-Geneva into the Plate Carree or Simple Cylindrical Projection (a particular form of the Equirectangular). The original digitized polygon vertices in table coordinates were rasterized and georeferenced using the ELAS (NASA's Earth Resources Laboratory Applications Software) programs on a Perkin- Elmer 3241 minicomputer, with an output cell (pixel) size of 30 seconds latitude/longitude spatial resolution (approx. 925 meters at Equator), or 0.86 square kilometers/pixel. The resulting database was also generalized (resampled) to two minutes latitude/longitude resolution (approximately 3.7 km. on a side), yielding an output cell size of 13.7 square kilometers. This is the spatial resolution which UNEP/GRID ( - Geneva) normally recommends to users and most frequently distributes. The original FAO-Unesco Soil Map of the World included information on texture, slope and phase, but separate data layers depicting these variables have not been developed by UNEP/GRID. The proper reference or original source document for this data set is as follows: "FAO-Unesco Soil Map of the World, 1:5000000, ten volumes, Unesco-Paris 1974." The FAO-Unesco Soil Map of the World data file consists of 5400 lines by 10800 elements, with an origin of 180 degrees West longitude and 90 degrees north latitude. At two minutes lat./long. spatial resolution, (approx. 3.67 km. or 30 per degree), the data file covers the entire globe to 180 degrees East and 90 degrees south, and comprises 58.32 Mb. * - There are 106 original Soil Units, and 27 ("Great") Soil Groups; of these, 23 were composed of various soil units and four had ONLY the Group name designations. Therefore, it was only necessary to add 23 new classes to the UNEP/GRID version legend, for 129 in total (106 + 23 = 129). There are three additional categories in the GRID legend for Rock, Salt and Water, or 132 classes altogether.
Geographic Coverage
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Spatial coordinates
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N: 79.0
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S: -10.0
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E: -170.0
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W: 20.0
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Access Constraints
Public
Distribution
Distribution Media:
FTP
Distribution Size:
Approx 484 MB per file
Distribution Format:
HDF-EOS
Fees:
None
Personnel
Role:
INVESTIGATOR
City:
De Bilt
Province or State:
AE
Postal Code:
3730
Country:
NL
Role:
TECHNICAL CONTACT
Role:
DIF AUTHOR
Phone:
301-614-5284
Email:
Suraiya.Ahmad at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 610.2
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Publications/References
Ahmad, S. P., P. F. Levelt, P. K. Bhartia, E. Hilsenrath, G. W. Leppelmeier,and J. E. Johnson, &Atmospheric Products from the Ozone Monitoring Instrument(OMI)&, Proceedings of SPIE conference on Earth Observing Systems VIII, San Diego, California, Aug 3-8, 2003. ... http://disc.sci.gsfc.nasa.gov/acdisc/ozone/docs/omi-spie-2003.doc Bhartia, P. K., P. F. Levelt, J. Tamminen, O. Torres, Recent results from the Ozone Monitoring Instrument (OMI) on EOS Aura, Proceedings of SPIE conference on Remote Sensing of the Atmosphere and Clouds, Volume 6408, Si-Chee Tsay et al. (Ed.), 64080Y, Goa, India, Nov 28, 2006 Brinksma, E. J., K. F. Boersma, and P. F. Levelt, OMI-Validation Requirements, May 16, 2003. Dirksen, R., M.R. Dobber, R. Voors and P. Levelt, Pre-launch characterization of the Ozone Monitoring Instrument transfer function in the spectral domain, Appl. Optics, 2006, 45, no 17, 3972-3981 . Dobber, M.R., R. Dirksen, P. Levelt, G.H.J. van den Oord, R. Voors, Q. Kleipool, G. Jaross, M. Kowalewski, E. Hilsenrath, G. Leppelmeier, J. de Vries, W. Dierssen and N. Rozemeijer, Ozone Monitoring Instrument calibration, IEEE Trans. Geo. Rem. Sens., 2006, Vol. 44, No. 5, 1209-1238, doi:10.1109/TGRS.2006.869987. http://www.knmi.nl/omi/documents/publications/2005-05_Applied_Optic... Dobber, M.R., R. Dirksen, P. Levelt, G.H.J. van den Oord, R. Voors, Q. Kleipool, G. Jaross en M. Kowalewski, Ozone Monitoring Instrument in-flight performance and calibration, Proceedings SPIE Optical Systems Design 2005, 12-16 September 2005, Jena, Germany, 2006 Kowalewski, J.M.G., G.R. Jaross, R.P Cebula, S.L. Taylor, G.H.J. van den Oord, M.R. Dobber, R.J. Dirksen, Evaluation of OMI pre-launch radiometric calibration and on-orbit performance using in-flight data, Proceedings SPIE's Annual Meeting, San Diego (U.S.A.), 31 July - 4 August 2005, Optical Science, Engineering, and Instrumentation. Earth observing systems X (vol. 5882). Levelt, P.F., G.H.J. van den Oord, M.R. Dobber, A. Malkki, H. Visser, J. de Vries, P. Stammes, J. Lundell and H. Saari, The Ozone Monitoring Instrument, IEEE Trans. Geo. Rem. Sens., 2006, Vol. 44, No. 5, 1093-1101, doi:10.1109/TGRS.2006.872333. Levelt, P.F., E. Hilsenrath, G.W. Leppelmeier, G.H.J. van den Oord, P.K. Bhartia, J. Tamminen, J.F. de Haan en J.P. Veefkind, Science Objectives of the Ozone Monitoring Instrument, IEEE Trans. Geo. Rem. Sens., 2006, Vol. 44, No. 5, 1199-1208, doi:10.1109/TGRS.2006.872336. Levelt, P.F., J. P. Veefkind, R. H. M. Voors, and J. de Vries, &Instrument Description&, Algorithm Theoretical Baseline Document: OMI Instrument, Level 0 - 1B processor, Calibration & Operations, P. F. Levelt (ed.), vol. I, ATBD-OMI-01, version 2, Aug. 2002. http://eospso.gsfc.nasa.gov/sites/default/files/atbd/ATBD-OMI-01.pdf Oord, G.H.J. van den, N.C. Rozemeijer, V. Schenkelaars, P.F. Levelt, M.R. Dobber, R.H.M. Voors, J. Claas, J. de Vries, M. ter Linden, C. De Haan and T. van den Berg, OMI level 0 to 1b processing and operational aspects, IEEE Trans. Geo. Rem. Sens., 2006, Vol. 44, No. 5, 1380-1397, doi:10.1109/TGRS.2006.872935. Oord, G. H. J. van den, R. H. M. Voors, and J. de Vries, &The Level 0 to Level 1B processor for OMI radiance, irradiance and calibration data&, Algorithm Theoretical Baseline Document: OMI Instrument, Level 0-1B processor, Calibration & Operations, P. F. Levelt (ed.), vol. I, ATBD-OMI-01, version 2, Aug. 2002. Voors, R. H. M., M. R. Dobber, and R. J. Dirksen, & OMI Calibration and Characterisation&, Algorithm Theoretical Baseline Document: OMI Instrument, Level 0 - 1B processor, Calibration & Operations, P. F. Levelt (ed.), vol. I, ATBD-OMI-01, version 2, Aug. 2002. Vries, J. de, R.H.M. Voors, R.J. Dirksen, and M.R. Dobber, In-orbit performance of the Ozone Monitoring Instrument, Proceedings SPIE Remote Sensing Europe conference, Bruges, Belgium, 19-22 September 2005 Schoeberl, M.R., A.R. Douglass, E. Hilsenrath, P.K. Bhartia, R. Beer, J.W. Waters, M.R. Gunson, L. Froidevaux, J.C. Gille, J.J. Barnett, P.F. Levelt and P. DeCola, Overview of the EOS aura mission, IEEE Trans. Geo. Rem. Sens., 2006, Vol. 44, No. 5, 1066-1074, doi:10.1109/TGRS.2005.861950. Schoeberl, M.R., A.R. Douglass, E. Hilsenrath, P.K. Bhartia, J. Barnett, J. Gille, R. Beer, M. Gunson, J. Waters, P.F. Levelt,P. DeCola, &The EOS Aura Mission,& EOS, Transactions, American Geophysical Union 85 , Number 18, 4 May 2004. [Preprint] http://aura.gsfc.nasa.gov/project/eos-agu-aura-article.pdf
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date:
2007-08-03
Last DIF Revision Date:
2013-04-29
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