How can you tell if you have a 4th Generation MrSID file. Download the GeoViewer from www.Lizardtech.com. This is a Viewer that can be used for a number of handy operations.
Use GeoViewer to Check the Version of MrSID Files
1.) Launch GeoViewer
2.) Go to File->Add Layer->Local Layer and load the image
3.) Go to Layer->View Layer Metadata
4.) Highlight Image Properties to see the version of the MrSID file under Format as shown in the image below
5.) 4th Generation should show MRSID/MG4RASTER.
Note : Use GeoViewer under Tools to export this image as a TIFF and then you can use the image in AutoCAD
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