Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I just found out there are a few types of MrSID files - generations MG2,MG3,MG4. As I have a user which uses Bentley Microstation V8 and apparently can see only some of the generations (and thus I need to convert between the different generations)- I wanted to know if there is a quick way to detect what generation a SID file is (I have AutoCAD 2007, ArcGIS 9.3.1)?

Thanks in advance.

share|improve this question
up vote 5 down vote accepted

In ArcCatalog right click on the image and select Properties. Look at the compression type, MG! (generation 1), MG2 (generation 2), MG3 (generation 3), and MG4 (generation 4).

share|improve this answer
As the answer is simple, I feel a bit stupid. But I thank you very much! – jonatr Dec 19 '11 at 13:51

gdalinfo will also tell you the same information with a VERSION tag.

share|improve this answer
Thanks - I'll give that a go. – jonatr Dec 19 '11 at 15:18

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.