SIR-C D1 tape Proprietary None 256 x 18,724 files software 200 x 1 .80 GB (PV-WAVE) 44 KB 8 mm tape GIF Unitree 16:1 None 500 x 2,395 files reduction as 696 x 1 0.49 GB delivered 217 KB from NIMA None JPEG Declass Film Scanned In JPEG 420 x 47,004 files II comment 1480 x 1 6.14 GB None JPEG 136 KB DLT7000 Pnmscale None 157 x 435 16,331 files tape 0.125, bands x 3 0.31 GB EO-1 4,3,1 ALI 23 KB None JPEG 75% DLT7000 Pnmscale None 64 x 838 15,057 files tape 0.25, bands x 3 0.20 GB EO-1 40,31,13 19 KB None JPEG 75% Lessons Learned Although the intent was that browse should be independent of EDC’s technology, choices were clearly influenced by such factors as typical screen size, on-line storage capacity, and network bandwidth. In recognition of these factors, browse parameters should be constantly as technology changes. The original and current definition of browse was strongly EDC’s influenced by the original Landsat type products: scene based raster imagery. Vector data, elevation data, seamless data, and swath-based products are difficult to fit into the current model.
SIR-C D1 tape Proprietary software (PV-WAVE) None 256 x 200 x 1 44 KB 18,724 files .80 GB 8 mm tape GIF Unitree 16:1 reduction as delivered from NIMA None 500 x 696 x 1 217 KB 2,395 files 0.49 GB None JPEG Declass II Film Scanned In JPEG comment 420 x 1480 x 1 136 KB 47,004 files 6.14 GB None JPEG EO-1 ALI DLT7000 tape Pnmscale 0.125, bands 4,3,1 None 157 x 435 x 3 23 KB 16,331 files 0.31 GB None JPEG 75% EO-1 DLT7000 tape Pnmscale 0.25, bands 40,31,13 None 64 x 838 x 3 19 KB 15,057 files 0.20 GB None JPEG 75% Lessons Learned Although the EDC’s intent was that browse should be independent of technology, choices were clearly influenced by such factors as typical screen size, on-line storage capacity, and network bandwidth. In recognition of these factors, browse parameters should be constantly as technology changes. The EDC’s original and current definition of browse was strongly influenced by the original Landsat type products: scene based raster imagery. Vector data, elevation data, seamless data, and swath-based products are difficult to fit into the current model.