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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