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Help Page for MrSID Image Format Files

What is MrSID?
How are MrSID Generation 2, Generation 3 and JPEG 2000 formats different?
How do I look at MrSID files?
How do I reproject MrSID files?
How do I change MrSID to another format?


What is MrSID?

MrSID is a proprietary data format that allows image files to be substantially compressed with little to no loss of image quality. This format, developed and marketed by LizardTech, Inc., allows you to view any portion of a MrSID image at any resolution very quickly. The name stands for "MultiResolution Seamless Image Database."

For more information, see LizardTech's MrSID webpage.
 


How are MrSID Generation 2, Generation 3 and JPEG 2000 formats different?

See LizardTech's explanation. For more information on JPEG 2000, see MnGeo's help page.
 


How do I look at MrSID files?

You may look at MrSID files with your web browser or with many geographic information systems (GIS) software packages.


How do I reproject MrSID files?

Many users of Minnesota GIS data would like to display MrSID files from one UTM zone with other files that are in another UTM zone.

Reproject using GeoExpress software

LizardTech's GeoExpress Tools software will reproject MrSID format files. For more information and to download a trial version, see the GeoExpress page.
 

Display using ArcGIS software

ESRI's ArcGIS software will display MrSID files in another zone -- this method does not change the file itself, just the display. Note that the following instructions assume that you know which zone the file is in and that all of the data files are in the NAD83 datum.

1.  Set the projection for each file

The method for setting the projection varies depending on the file type:

MrSID

Shapefile

Coverage or ArcGrid

2.  Display the files in ArcMap


How do I change MrSID to another format?

LizardTech, Inc. provides a free GeoViewer and a free command-line tool called "mrsidgeodecode" which can be used to decode .sid images to TIFF, JPEG and other formats. For more information, see Decoding a MrSID file to other formats.


 

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