Landsat HDT/DCT Subsampled GLIS browse 400 x 536,126 files TM 16th header in JPEG 400 x 3 19.67 GB line/16th comment 38 KB sample Bands 5, 4, 3 Contrast stretched Color composite 3480/3490 JPEG 75% tape Landsat D3 tape Three In JPEG 825 x 624,965 files 7 ETM wavelet comment 750 x 3 63.93GB passes (8x 185 KB reduction) Bands 5,4,3 contrast stretched color composite None JPEG 90% Corona Film Scanned at GLIS browse 1400 x 862,584 files 50 or 100 header in JPEG 115 x 1 29.01 GB dpi comment 36 KB 3490 tape JPEG 75% DOQ Unitree Quarter GLIS browse 800 x 260,669 files quads header in JPEG 1000 40.67GB subsampled comment (not 158 KB 2nd line/2nd present in all sample, full files) quads subsampled 4th line/4th sample, both followed by two wavelet passes (3x3 filter) None JPEG 75% SPOT HDT/DCT Proprietary In JPEG 512 x 998,017 files software comment 500 42.73 GB (ACS). 45 KB None JPEG 75%
Landsat TM HDT/DCT Subsampled 16th line/16th sample Bands 5, 4, 3 Contrast stretched Color composite GLIS browse header in JPEG comment 400 x 400 x 3 38 KB 536,126 files 19.67 GB 3480/3490 tape JPEG 75% Landsat 7 ETM D3 tape Three wavelet passes (8x reduction) Bands 5,4,3 contrast stretched color composite In JPEG comment 825 x 750 x 3 185 KB 624,965 files 63.93GB None JPEG 90% Corona Film Scanned at 50 or 100 dpi GLIS browse header in JPEG comment 1400 x 115 x 1 36 KB 862,584 files 29.01 GB 3490 tape JPEG 75% DOQ Unitree Quarter quads subsampled 2nd line/2nd sample, full quads subsampled 4th line/4th sample, both followed by two wavelet passes (3x3 filter) GLIS browse header in JPEG comment (not present in all files) 800 x 1000 158 KB 260,669 files 40.67GB None JPEG 75% SPOT HDT/DCT Proprietary software (ACS). In JPEG comment 512 x 500 45 KB 998,017 files 42.73 GB None JPEG 75%
WGISS_DSIG_Browse-Survey-1997-2010_Sep2011.docx