BOREAS Follow-on DSP-10 Regridded FPAR Maps for 1994, 10 by 5 minutes --------------------------------------------------------------------- Revised: March 2, 2001 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 the 1-km pixels of the given land cover class that falls in each 10' by 5' pixel. See document "rss07_avhrr_lai_fpar_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 Dave Knapp (David.Knapp@gsfc.nasa.gov) Image Specifications -------------------- The following images are stored here: FPAR from 21-31 May 1994 FPAR from 21-31 Jul 1994 FPAR from 01-10 Sep 1994 ------------------------- ------------------------- ------------------------- 94-05-21_fpar_class00.img 94-07-21_fpar_class00.img 94-09-01_fpar_class00.img 94-05-21_fpar_class01.img 94-07-21_fpar_class01.img 94-09-01_fpar_class01.img 94-05-21_fpar_class02.img 94-07-21_fpar_class02.img 94-09-01_fpar_class02.img 94-05-21_fpar_class03.img 94-07-21_fpar_class03.img 94-09-01_fpar_class03.img 94-05-21_fpar_class04.img 94-07-21_fpar_class04.img 94-09-01_fpar_class04.img 94-05-21_fpar_class05.img 94-07-21_fpar_class05.img 94-09-01_fpar_class05.img 94-05-21_fpar_class06.img 94-07-21_fpar_class06.img 94-09-01_fpar_class06.img ** 94-05-21_fpar_class07.img 94-07-21_fpar_class07.img 94-09-01_fpar_class07.img 94-05-21_fpar_class08.img 94-07-21_fpar_class08.img 94-09-01_fpar_class08.img ** 94-05-21_fpar_class09.img 94-07-21_fpar_class09.img 94-09-01_fpar_class09.img 94-05-21_fpar_class10.img 94-07-21_fpar_class10.img 94-09-01_fpar_class10.img ** 94-05-21_fpar_class11.img 94-07-21_fpar_class11.img 94-09-01_fpar_class11.img 94-05-21_fpar_class12.img 94-07-21_fpar_class12.img 94-09-01_fpar_class12.img 94-05-21_fpar_class13.img 94-07-21_fpar_class13.img 94-09-01_fpar_class13.img 94-05-21_fpar_class14.img 94-07-21_fpar_class14.img 94-09-01_fpar_class14.img 94-05-21_fpar_class15.img 94-07-21_fpar_class15.img 94-09-01_fpar_class15.img 94-05-21_fpar_class16.img 94-07-21_fpar_class16.img 94-09-01_fpar_class16.img 94-05-21_fpar_class17.img 94-07-21_fpar_class17.img 94-09-01_fpar_class17.img 94-05-21_fpar_class18.img 94-07-21_fpar_class18.img 94-09-01_fpar_class18.img 94-05-21_fpar_class19.img 94-07-21_fpar_class19.img 94-09-01_fpar_class19.img 94-05-21_fpar_class20.img 94-07-21_fpar_class20.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. Lou Steyaert's Land Cover Classification ======================================== Class ID Class Name -------- ------------------------------------------------------ 1 Wet Conifer (Low Stand Density) 2 Wet Conifer (Medium Stand Density) 3 Wet Conifer (High Stand Density) 4 Upland Conifer/Fen 5 Rock Outcrops/Bare Ground/Sparse Vegetation/ Slow Regeneration Burn Areas 6 NA 7 Open Water 8 NA 9 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 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. 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