BOREAS FOLLOW-ON DSP-10 REGRIDDED PEATLAND MAPS
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Data Citation:
DSP-10 Regridded Peatland Maps. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.
Contacts:
(301) 614-6659
(301) 614-6695
Forrest.G.Hall@gsfc.nasa.gov
Gloria Rapalee
University of California, Irvine
NASA GSFC
Greenbelt MD
(301) 286-0544
(301) 286-0239
grapalee@pop900.gsfc.nasa.gov
David Knapp
Raytheon ITSS
NASA/GSFC
Greenbelt, MD
Phone: (301) 286-1424
David.Knapp@gsfc.nasa.gov
Processing:
Regridded derived from the polygon-based Peatlands of Canada Database pixel size in a straight latitude/longitude grid. We assume that many grid cells partially include water bodies, we also include an corner of the coverage has no data.
These images were produced by aggregating 1' gridded data layers derived from the polygon-based Peatlands of Canada Database (Tarnocai et al., 2000) to a 0.5 degree by 0.5 degree (or 30' by 30') pixel size in a straight latitude/longitude grid. We assume that the peatlands are equally distributed within each polygon. Because many grid cells partially include water bodies, we also include an aggregated image of percentage of water. A portion of the southwest corner of the coverage has no data.
Image Specifications
might not be 100 for a given pixel because of rounding. Files are also available in ASCII format.
Peatland Maps, 30 minutes |
bog_30min.img, bog_30min.asc fen_30min.img, fen_30min.asc total_30min.img, total_30min.asc water_30min.img, water_30min.asc nodata_30min.img, nodata_30min.asc |
The peatland spatial cover (Tarnocai et al., 2000) is a simple cover of peatland types and their distribution related to each polygon. The aggregated images listed above correspond to the attributes associated with each polygon as follows:
PEAT-ID (Polygon ID)
BOG_PCT (Percentage of bog in polygon)
FEN_PCT (Percentage of fen in polygon)
TOTAL (Percentage of peatland in polygon)
TYPE (Dominant peatland type: bog, fen, bog & fen, water body)
Spatial Coverage
identical to the upper left corner of Val's regional data set.
Corner X Y Longitude Latitude
----------------------------------------------------------------
Upper Left 242.697 675.191 107°00'00.00" W 57°00'00.00" N
Upper Right 903.583 765.939 96°00'00.00" W 56°00'00.00" N
Lower Left 274.686 119.043 107°00'00.00" W 52°00'00.00" N
Lower Right 1022.683 221.752 96°00'00.00" W 52°00'00.00" N
The X and Y coordinates are the BOREAS grid coordinates which are based on an Albers Equal Area Conic (AEAC) projection with the following parameters:
Origin: 111.00 deg W, 51.00 deg N
Standard Parallels: 52.5 deg N, 58.5 deg N
Units of Measure: kilometers
References:
Citation
DSP-10 Regridded Peatland Maps. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.
Document ID: dsp10_peatlands Document Revision Date:
27-Sept-2001 (citation revised on 30-Oct-2002)
Document Review Date: 27-Sept-2001 Document Curator:
webmaster@daac.ornl.gov
Document URL:
http://daac.ornl.gov