BOREAS Follow-on DSP-10 Regridded Moss Cover Maps, 10 by 5 minutes
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Revised: March 2, 2001

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 document "dsp09_moss_cover_doc.html" for more information on the
original data product that this is based on.

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


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

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.

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

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 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
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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 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