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BOREAS FOLLOW-ON DSP-10 REGRIDDED MOSS COVER MAPS FOR 1994
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Summary:


Existing 1-km moss cover classifications were reprocessed and are now available at multiple resolutions (2 km, 10x5 minutes, and
0.5 degree).  These data were regridded for use by the BOREAS Follow-on Carbon and Hydro-Meteorological modeling groups to have a number of data sets available in common grid projections and scales for intercomparison studies. Characteristics of the individual products are described below.
 

Maps included in this data set:

Regridded Moss Cover Maps, 2 kilometers
Regridded Moss Cover Maps, 10 by 5 minutes
Regridded Moss Cover Maps, 54 km
 

Data Citation:

Cite this data set as follows (citation revised on October 30, 2002):

Hall, F., G. Rapalee, and D. Knapp. 2001. BOREAS Follow-On DSP-10 Regridded Moss Cover Maps for 1994. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.

Contacts:

Forrest G. Hall
University of Maryland
NASA GSFC
Greenbelt MD
(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:

If there are any questions about how this aggregation was done, please contact Gloria Rapalee (Gloria.Rapalee@gsfc.nasa.gov).
 

These regridded  maps may utilize class numbers that correspond to Lou Steyaert's AFM-12 classification or include data that cover the same area as the land cover classification.  When referenced in the regridded map description, please refer to the following Land Cover Classification table.  For more information, please access the following BOREAS data set and documentation.

BOREAS AFM-12 1-km AVHRR Seasonal Land Cover Classification

This regional land cover data set was developed as part of a multitemporal 1-km AVHRR land cover analysis approach that was used as the basis for regional land cover mapping, fire disturbance-regeneration, and multiresolution land cover scaling studies in the boreal forest ecosystem of central Canada (Steyaert et al., 1997).  This land cover classification was derived by using regional field observations from ground and low-level aircraft transits to analyze spectral-temporal clusters that were derived from an unsupervised cluster analysis of monthly NDVI image composites (April-September 1992).  This regional data set was developed for use by BOREAS investigators, especially those involved in simulation modeling, remote sensing algorithm development, and aircraft flux studies.  Based on regional field data verification, this multitemporal 1-km AVHRR land cover mapping approach was effective in characterizing the biome-level land cover structure, embedded spatially heterogeneous landscape patterns, and other types of key land cover information of interest to BOREAS modelers.
 

Lou Steyaert's Land Cover Classification
Class ID Class Name
Wet Conifer (Low Stand Density)
Wet Conifer (Medium Stand Density)
Wet Conifer (High Stand Density)
Upland Conifer/Fen
Rock Outcrops/Bare Ground/Sparse Vegetation/
Slow Regeneration Burn Areas
NA
Open Water
NA
Regeneration (North: Within Canadian Shield Zone)
10  NA
11  Recent Visible Burn
12  Rangeland/Pasture/Hay/Aspen Patches
13  Mixed Agriculture/Predominately Grains
14  Mixed Agriculture/Predominately Pasture/Hay
15  Grassland Marshes
16  Mixed Forest (80% Coniferous)
17  Mixed Forest (50% Coniferous)
18  Mixed Forest (80% Deciduous)
19  Regeneration (South: generally south of Shield Zone)
20  Unknown



Regridded Moss Cover Maps, 2 kilometers


These images were produced by aggregating the 1-km moss maps to a 2-km pixel size. The original 1-km moss map was derived from the 1-km land cover classification that was done by Lou Steyaert.
      See the document dsp09_moss_cover_doc.html for more information on the original data product that this is based on.


Image Specifications

Each image is 431 pixels by 336 lines and contains no leading header bytes. Each pixel in the image is represented by one-byte.

The following files contain the percentage of each class within each 2-km pixel. Th pixel values will be either 0, 25, 50, 75, or 100, since exactly four 1-km pixels are nested within a 2-km pixel.

Moss Cover Maps, 2km
moss00_2km.img
moss01_2km.img
moss02_2km.img
moss03_2km.img
moss04_2km.img
moss05_2km.img
moss06_2km.img 

The class numbers correspond to the class numbers used by Gloria Rapalee in her classification.
 

Rapalee Moss Cover Classification
Class ID Class Name
Class 0 Outside of data area of image (edge pixels)
Class 1 Feather Moss
Class 2 Feather Moss/Sphagnum
Class 3 Sphagnum
Class 4 Feather/Brown/Spagnum Moss Mix
Class 5 No Moss
Class 6 Water


Spatial Coverage

These data cover the same area as the land cover classification from Lou Steyaert.
Corner          X         Y        Longitude         Latitude
----------------------------------------------------------------------
Upper Left    174.0707  785.4531 108°03'09.30" W   58°01'07.68" N
Upper Right   1036.0707 785.4531  93°48'17.52" W   56°53'52.87" N
Lower Left    174.0707  113.4531 108°27'59.25" W   51°59'32.04" N
Lower Right   1036.0707 113.4531  96°08'36.17" W   51°01'20.43" 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



Regridded Moss Cover Maps, 10 by 5 minutes


These images were produced by aggregating the 1-km moss cover classification by Gloria Rapalee to a 10' (horizontal) by 5' (vertical)pixel size in a straight latitude/longitude grid. This moss classification is based on Lou Steyaert's land cover classification.
      See the document dsp09_moss_cover_doc.html for more information on the original data product that this is based on.


Image Specifications

Each image is 66 pixels by 60 lines and contains no leading header bytes. Each pixel in the image is represented by one byte. The DN is the percentage of the pixel which falls in a given class.

The following files contain the percentage of each class within each 10' by 5' pixel.

Moss Cover Maps, 10 by 5 minutes
moss00_10by5min.img
moss01_10by5min.img
moss02_10by5min.img
moss03_10by5min.img
moss04_10by5min.img
moss05_10by5min.img
moss06_10by5min.img 

The class numbers correspond to the class numbers used by Gloria Rapalee in her classification.
 

Rapalee Moss Cover Classification
Class ID Class Name
Class 0 Outside of data area of image (edge pixels)
Class 1 Feather Moss
Class 2 Feather Moss/Sphagnum
Class 3 Sphagnum
Class 4 Feather/Brown/Spagnum Moss Mix
Class 5 No Moss
Class 6 Water


The Pixel-Area Image

The file "0_pixel_area_10by5min.img" is an image that provides the area for each of the 10 by 5 minute cells. The area for each pixel is given in hectares. One hectare equals 10,000 square meters.
      Each pixel value is represented as a 2-byte integer. This image has the low-order byte first. On some systems, the bytes may need to be swapped in order the read the 2-byte integers correctly. On UNIX systems, this can be done with the following command.
dd if=input_file_name conv=swab of=output_file_name

Spatial Coverage

These data cover the same area as the regional meteorological parameters assembled by Val Pauwels. The data are in a straight latitude/longitude grid. The BOREAS grid coordinates listed below are simply given for reference purposes. The corner coordinates are 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   57°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 listed above 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



Regridded Moss Cover Maps, 54 km


These images were produced by aggregating the 1-km moss maps to a 54-km pixel size. 54-km roughly equals one-half a degree (30 minutes) of latitude. The original 1-km moss map was derived from the 1-km land cover classification that was done by Lou Steyaert.
      See the document dsp09_moss_cover_doc.html for more information on the original data product that this is based on.


Image Specifications

Each image is 16 pixels by 12 lines and contains no leading header bytes. Each pixel in the image is represented by one-byte.

The following files contain the percentage of each class within each 54-km pixel.

Moss Cover Maps, 54 km
moss00_54km.img
moss01_54km.img
moss02_54km.img
moss03_54km.img
moss04_54km.img
moss05_54km.img
moss06_54km.img 

The class numbers correspond to the class numbers used by Gloria Rapalee in her classification.
 

Rapalee Moss Cover Classification
Class ID Class Name
Class 0 Outside of data area of image (edge pixels)
Class 1 Feather Moss
Class 2 Feather Moss/Sphagnum
Class 3 Sphagnum
Class 4 Feather/Brown/Spagnum Moss Mix
Class 5 No Moss
Class 6 Water


Spatial Coverage

These data cover the same area as the land cover classification from Lou Steyaert. The upper left corner is identical to the upper left corner of Lou Steyaert's classification. Due to rounding off to the nearest 54-km pixel, the other corners are in slightly different locations.
Corner          X         Y        Longitude         Latitude
--------------------------------------------------------------------------
Upper Left    174.0707  785.4531 108°03'09.30" W   58°01'07.68" N
Upper Right   1038.0707 785.4531  93°46'22.83" W   56°53'37.06" N
Lower Left    174.0707  137.4531 108°27'13.26" W   52°12'28.30" N
Lower Right   1038.0707 137.4531  96°02'33.91" W   51°13'46.60" 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:


Steyaert, L.T., F.G. Hall, and T.R. Loveland. 1997. Land Cover Mapping, Fire Disturbance-Regeneration, and Multiresolution Land Cover Scaling Studies in the BOREAS Forest Ecosystem with Multiresolution 1-km AVHRR. J. Geophys. Res.102: 29581-29598.

Citation

Cite this data set as follows (citation revised on October 30, 2002):

Hall, F., G. Rapalee, and D. Knapp. 2001. BOREAS Follow-On DSP-10 Regridded Moss Cover Maps for 1994. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.

Document Information:

dsp10_moss_cover

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/BOREAS/FollowOn/guides/dsp10_moss_cover_maps.html