MrSid

Action Plan: Multiresolution Seamless Image Database Generation 2

Last Updated 12/05/2013

Description: The Multi-resolution Seamless Image Database (MrSID) format is used for storing GIS data. Its wavelet-based image compression was developed in the Los Alamos National Laboratories for use by the FBI to store and analyze finger prints. The MrSID format, which uses the extension sid, was developed by Lizardtech to store very large georeferenced raster images.

Codec:  The previous version of the MrSID format. Compatible with modern rendering software.

Software:  Geoviewer for conversion,Mapwindow GIS(open source).

Long Term Preservation Plan:  MrSid is a Proprietary format owned by LizardTech. It has been replaced in the LC by JPEG 2000 and TIFF. Support for the format has dropped out of most modern browsers and viewers. While it remains a popular GIS format, curators should seriously consider migration to more open and sustainable formats such as the aforementioned JPEG 2000 and TIFF when practicable.

Division Specific Notes:  Before the development of JPEG 2000, LC used MrSID_MG2 as a service format for large digitized images (primarily maps). Between 1996 and 2005, LC created MrSID_MG2 derivatives from master uncompressed TIFF images (TIFF_UNC) to facilitate zooming for close study of detail over the web. JPEG 2000 (Part 1, lossy), J2K_C_LSY, is now used in place of MrSID, and substitution of JPEG 2000 for MrSID images produced earlier has been completed. (DigitalPreservation.org )

Review in two years (2015)