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BOREAS FOLLOW-ON DSP-10 RECLASSIFIED REGRIDDED TM MOSAIC LAND COVER MAPS, 1994
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Summary:

These images were produced by aggregating a reclassified version of the 30-m land cover Thematic Mapper classification by CCRS and are now available at multiple resolutions (10x5 minutes, and 30 minutes). These data were regridded for use by the BOREAS Follow-on Carbon and Hydro-Meteorological modeling groups. Characteristics of the individual products are described below.

Maps included in this data set:

Regridded Reclassed TM Mosaic Land Cover Maps, 10 by 5 minutes
Regridded Reclassed TM Mosaic Land Cover Maps, 30 min
 

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 Reclassified Regridded TM Mosaic Land Cover Maps, 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 Dave Knapp (David.Knapp@gsfc.nasa.gov).



Regridded Reclassed TM Mosaic Land Cover Maps, 10 by 5 minutes

These images were produced by aggregating a reclassified version of the 30-m land cover Thematic Mapper classification by CCRS to a 10' (horizontal) by 5' (vertical) pixel size in a straight latitude/longitude grid. We lumped the CCRS classes into groups that are more uniform with respect to carbon flux and that can be more easily parameterized within the models. Each class in the "lumped" taxonomy is grouped by age, nutrient status, crown density, and forest type. This results in the groups where we rank-ordered the classes as follows: classes 1 and 2 are low nutrient cycling; classes 3, 4, 5 are high, moderate, and low carbon accumulation classes, respectively. See the document dsp01_tm_landcover_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 value for each pixel is the percentage of the coverage that pixel that is of a given class. The sum of all of the percentages in the various images might not be 100 for a given pixel because of rounding.
 
Land Cover Maps, 10 by 5 minutes
01_wet_conf_low_10by5min.img 
02_wet_conf_med_10by5min.img
03_dry_conf_low_10by5min.img
04_dry_conf_med_10by5min.img
05_dry_conf_high_10by5min.img
06_decid_low_10by5min.img
07_decid_med_10by5min.img
08_decid_high_10by5min.img
09_mixed_med_10by5min.img
10_mixed_high_10by5min.img
11_burn_10by5min.img
12_grassland_10by5min.img
13_other_10by5min.img
14_water_10by5min.img

An additional image is included for which the DN value for each pixel is the percentage of the coverage of the CCRS mosaic in that pixel:

class00_10by5min.img
The class numbers correspond to the class numbers used by CCRS in their classification (in parentheses). See CCRS documentation for complete description.
 
CCRS Land Cover Classification
Class ID Class Name
Class 00 Percent of data coverage area of image
Class 01 Wet conifer, low density (43, 55)
Class 02 Wet conifer, medium density (25)
Class 03 Dry conifer, low density (59)
Class 04 Dry conifer, medium density (22, 32)
Class 05 Dry conifer, high density (7, 11, 21)
Class 06 Deciduous, low density (99)
Class 07 Deciduous, medium density (80)
Class 08 Deciduous, high density (79)
Class 09 Mixed, medium density (36)
Class 10 Mixed, high density (39, 53, 69, 64)
Class 11 Burn (13, 35, 81, 112, 113, 134)
Class 12 Grassland (85)
Class 13 Other (150, 160, 161, 162)
Class 14 Water (1)


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 Reclassed TM Mosaic Land Cover Maps, 30 min

These images were produced by aggregating a reclassified version of the 30-m land cover Thematic Mapper classification by CCRS to a 0.5 degree by 0.5 degree (or 30' by 30') pixel size in a straight latitude/longitude grid. We lumped the CCRS classes into groups that are more uniform with respect to carbon flux and that can be more easily parameterized within the models. Each class in the "lumped" taxonomy is grouped by age, nutrient status, crown density, and forest type. This results in the groups where we rank-ordered the classes as follows: classes 1 and 2 are low nutrient cycling; classes 3, 4, 5 are high, moderate, and low carbon accumulation classes, respectively. See the document dsp01_tm_landcover_doc.html for more information on the original data product that this is based on.


Image Specifications

Each image is 22 pixels by 10 lines and contains no leading header bytes. Each pixel in the image is represented by one byte. The DN value for each pixel is the percentage of the coverage in that pixel that is of a given class. The sum of all of the percentages in the various images might not be 100 for a given pixel because of rounding. The following files contain the percentage of each class within each 0.5 deg by 0.5 deg pixel:
 
Land Cover Maps, 30 minutes
01_wet_conf_low_30min.img
02_wet_conf_med_30min.img
03_dry_conf_low_30min.img
04_dry_conf_med_30min.img
05_dry_conf_high_30min.img
06_decid_low_30min.img
07_decid_med_30min.img
08_decid_high_30min.img
09_mixed_med_30min.img
10_mixed_high_30min.img
11_burn_30min.img
12_grassland_30min.img
13_other_30min.img
14_water_30min.img

An additional image is included for which the DN value for each pixel is the percentage of the coverage of the CCRS mosaic in that pixel:

00_30min.img
The class numbers correspond to the class numbers used by CCRS in their classification (in parentheses). See CCRS documentation for complete description.
 
CCRS Land Cover Classification
Class ID Class Name
Class 00 Percent of data coverage area of image
Class 01 Wet conifer, low density (43, 55)
Class 02 Wet conifer, medium density (25)
Class 03 Dry conifer, low density (59)
Class 04 Dry conifer, medium density (22, 32)
Class 05 Dry conifer, high density (7, 11, 21)
Class 06 Deciduous, low density (99)
Class 07 Deciduous, medium density (80)
Class 08 Deciduous, high density (79)
Class 09 Mixed, medium density (36)
Class 10 Mixed, high density (39, 53, 69, 64)
Class 11 Burn (13, 35, 81, 112, 113, 134)
Class 12 Grassland (85)
Class 13 Other (150, 160, 161, 162)
Class 14 Water (1)


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  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


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 Reclassified Regridded TM Mosaic Land Cover Maps, 1994. Data set. Available on-line [http://www.daac.orn l.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Ten nessee, U.S.A.

Document ID:

dsp10_reclass

Document Revision Date:

27-Sep-2001 (citation revised on 30-Oct-2002)

Document Review Date:

27-Sep-2001

Document Curator:

webmaster@daac.ornl.gov

Document URL:

http://daac.ornl.gov/BOREAS/FollowOn/guides/dsp10_landcov_tm_rec_maps.html