Total file-space for digital reproductions: 500 Gbytes (estimated final).
Maps | Archival image | Service image | Inline thumbnail |
Marker | Filename extension ".tif" | Filename extension ".sid" | Filename extension ".gif" |
Formats | TIFF uncompressed | MrSID (
LizardTech wavelet compression) |
GIF |
Tonal resolution | 24 bit | 24 bit | 8 bit |
Spatial resolution (approx) | 300 dpi | 300 dpi | 200x150 pixels |
Quantity (approx) | 1,000 | 1,000 | 1,000 |
File size | 100-250 Mbytes | 3-9 Mbytes | 8-15 Kbytes |
Sample | Sample archival | Sample MrSID | Sample thumbnail |
Library of Congress contribution to Digital Libraries Initiative - Phase II
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