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BOREAS FOLLOW-ON DSP-10 REGRIDDED FPAR AND LAI MAPS FOR 1994
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Summary:

Existing BOREAS AVHRR derived FPAR and LAI maps 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.  Characteristics of the individual products are described below.

Maps included in this data set:

Regridded LAI Maps for 1994, 2 kilometers
Regridded LAI Maps for 1994, 10 by 5 minutes
Regridded FPAR Maps for 1994, 10 by 5 minutes
Regridded LAI Maps for 1994, 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 FPAR and LAI 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
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).

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 LAI Maps for 1994, 2 kilometers


These images were produced by averaging the 1-km LAI maps by Jing Chen to a 2-km pixel size.   See the document BOREAS RSS-07 Regional LAI and FPAR Images From Ten-Day AVHRR-LAC Composites  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 DN for each pixel can be converted to LAI with the following equation:
LAI = (DN - 1) / 10
The following files contain the percentage of each class within each 2-km pixel. The pixel values will be either 0, 25, 50, 75, or 100, since exactly four 1-km pixels are nested within a 2-km pixel.
 
LAI Maps, 2km
94-05-21_lai_2km.img (May 21-31, 1994)
94-07-21_lai_2km.img (July 21-31, 1994)
94-09-01_lai_2km.img (September 1-10, 1994)


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
 



Regridded LAI Maps for 1994, 10 by 5 minutes


There are two sets of images associated with this document. These images were produced by averaging the 1-km LAI maps by Jing Chen to a 10' (horizontal) by 5' (vertical) pixel size in a straight latitude/longitude grid.   See the document  BOREAS RSS-07 Regional LAI and FPAR Images From Ten-Day AVHRR-LAC Composites  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 for each pixel can be converted to LAI with the following equation:
LAI = (DN - 1) / 10
The first image product is the "Average LAI Maps", where each pixel represents the average LAI of the1-km pixels that fall in each 10' by 5' pixel.
Average LAI Maps, 10 by 5 minutes
94-05-21_lai_10by5min.img (May 21-31, 1994)
94-07-21_lai_10by5min.img (July 21-31, 1994)
94-09-01_lai_10by5min.img (September 1-10, 1994)

The second image product is the "Average LAI by Land Cover Class Maps", where each pixel DN represents the average LAI of the 1-km pixels of the given land cover class that falls in each 10' by 5' pixel.

Average LAI by Land Cover Class Maps, 10 by 5 minutes
LAI from 21-31 May 1994 LAI from 21-31 Jul 1994 LAI from 01-10 Sep 1994
94-05-21_lai_class00.img
94-05-21_lai_class01.img
94-05-21_lai_class02.img
94-05-21_lai_class03.img
94-05-21_lai_class04.img
94-05-21_lai_class05.img
94-05-21_lai_class06.img
94-05-21_lai_class07.img
94-05-21_lai_class08.img
94-05-21_lai_class09.img
94-05-21_lai_class10.img
94-05-21_lai_class11.img
94-05-21_lai_class12.img
94-05-21_lai_class13.img
94-05-21_lai_class14.img
94-05-21_lai_class15.img
94-05-21_lai_class16.img
94-05-21_lai_class17.img
94-05-21_lai_class18.img
94-05-21_lai_class19.img
94-05-21_lai_class20.img
94-07-21_lai_class00.img
94-07-21_lai_class01.img
94-07-21_lai_class02.img
94-07-21_lai_class03.img
94-07-21_lai_class04.img
94-07-21_lai_class05.img
94-07-21_lai_class06.img
94-07-21_lai_class07.img
94-07-21_lai_class08.img
94-07-21_lai_class09.img
94-07-21_lai_class10.img
94-07-21_lai_class11.img
94-07-21_lai_class12.img
94-07-21_lai_class13.img
94-07-21_lai_class14.img
94-07-21_lai_class15.img
94-07-21_lai_class16.img
94-07-21_lai_class17.img
94-07-21_lai_class18.img
94-07-21_lai_class19.img
94-07-21_lai_class20.img
94-09-01_lai_class00.img
94-09-01_lai_class01.img
94-09-01_lai_class02.img
94-09-01_lai_class03.img
94-09-01_lai_class04.img
94-09-01_lai_class05.img
94-09-01_lai_class06.img
94-09-01_lai_class07.img
94-09-01_lai_class08.img
94-09-01_lai_class09.img
94-09-01_lai_class10.img
94-09-01_lai_class11.img
94-09-01_lai_class12.img
94-09-01_lai_class13.img
94-09-01_lai_class14.img
94-09-01_lai_class15.img
94-09-01_lai_class16.img
94-09-01_lai_class17.img
94-09-01_lai_class18.img
94-09-01_lai_class19.img
94-09-01_lai_class20.img

Example: The file "94-05-21_lai_class18.img" represents the average LAI of the 1-km pixels (from 21-31 May 1994 LAI image) that are of class 18. The class numbers correspond to the class numbers from Lou Steyaert's AFM-12 classification. There is no class 6, 8, or 10 in Lou Steyaert's classification, thus there are no images representing the average LAI for those class numbers.


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 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 FPAR Maps for 1994, 10 by 5 minutes


These images were produced by averaging the 1-km FPAR maps by Jing Chen to a 10' (horizontal) by 5' (vertical) pixel size in a straight latitude/longitude grid. Each pixel DN represents the average FPAR of the1-km pixels of the given land cover class that falls in each 10' by 5' pixel.   See the document  BOREAS RSS-07 Regional LAI and FPAR Images From Ten-Day AVHRR-LAC Composites  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 for each pixel can be converted to FPAR with the following equation:
FPAR = (DN - 1) / 100
A DN of 255 indicates that there were no 1-km pixels of the given class within the 10' by 5' pixel area. Therefore, there is no average LAI value for that class.
 
FPAR Maps, 10 by 5 minutes
21-31 May 1994
21-31 Jul 1994
1-10 Sep 1994
94-05-21_fpar_class00.img
94-05-21_fpar_class01.img
94-05-21_fpar_class02.img
94-05-21_fpar_class03.img
94-05-21_fpar_class04.img
94-05-21_fpar_class05.img
94-05-21_fpar_class06.img
94-05-21_fpar_class07.img
94-05-21_fpar_class08.img
94-05-21_fpar_class09.img
94-05-21_fpar_class10.img
94-05-21_fpar_class11.img
94-05-21_fpar_class12.img
94-05-21_fpar_class13.img
94-05-21_fpar_class14.img
94-05-21_fpar_class15.img
94-05-21_fpar_class16.img
94-05-21_fpar_class17.img
94-05-21_fpar_class18.img
94-05-21_fpar_class19.img
94-05-21_fpar_class20.img
94-07-21_fpar_class00.img
94-07-21_fpar_class01.img
94-07-21_fpar_class02.img
94-07-21_fpar_class03.img
94-07-21_fpar_class04.img
94-07-21_fpar_class05.img
94-07-21_fpar_class06.img
94-07-21_fpar_class07.img
94-07-21_fpar_class08.img
94-07-21_fpar_class09.img
94-07-21_fpar_class10.img
94-07-21_fpar_class11.img
94-07-21_fpar_class12.img
94-07-21_fpar_class13.img
94-07-21_fpar_class14.img
94-07-21_fpar_class15.img
94-07-21_fpar_class16.img
94-07-21_fpar_class17.img
94-07-21_fpar_class18.img
94-07-21_fpar_class19.img
94-07-21_fpar_class20.img
94-09-01_fpar_class00.img
94-09-01_fpar_class01.img
94-09-01_fpar_class02.img
94-09-01_fpar_class03.img
94-09-01_fpar_class04.img
94-09-01_fpar_class05.img
94-09-01_fpar_class06.img **
94-09-01_fpar_class07.img
94-09-01_fpar_class08.img **
94-09-01_fpar_class09.img
94-09-01_fpar_class10.img **
94-09-01_fpar_class11.img
94-09-01_fpar_class12.img
94-09-01_fpar_class13.img
94-09-01_fpar_class14.img
94-09-01_fpar_class15.img
94-09-01_fpar_class16.img
94-09-01_fpar_class17.img
94-09-01_fpar_class18.img
94-09-01_fpar_class19.img
94-09-01_fpar_class20.img

Example: The file "94-05-21_fpar_class18.img" represents the average FPAR of the 1-km pixels (from 21-31 May 1994 FPAR image) that are of class 18. The class numbers correspond to the class numbers from Lou Steyaert's AFM-12 classification. There is no class 6, 8, or 10 in Lou Steyaert's classification, thus there are no images representing the average FPAR for those class numbers.


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 LAI Maps for 1994, 54 km


These images were produced by averaging the 1-km LAI maps by Jing Chen to a 54-km pixel size. 54-km roughly equals one-half a degree (30 minutes) of latitude.  See the document  BOREAS RSS-07 Regional LAI and FPAR Images From Ten-Day AVHRR-LAC Composites  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 DN for each pixel can be converted to LAI with the following equation:
LAI = (DN - 1) / 10
The following files contain the average LAI within each 54-km pixel.
Average LAI Maps, 54 km
94-05-21_lai_54km.img (May 21-31, 1994)
94-07-21_lai_54km.img (July 21-31, 1994)
94-09-01_lai_54km.img (September 1-10, 1994)


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 FPAR and LAI 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 ID:

DSP10_FPAR_LAI

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_LAI_FPAR_maps.html