[dkackman11]

I recall using these at university for heavy duty GIS raster processing. IRIX was my first *nix experience.

[lwhi]

I used these at university too. modelling and animating using Softimage 3D in 1998.

Makes me feel very old!

[Waterluvian]

I'm really eager to know how long ago and what kind of GIS software you used.

[ecommerceguy]

While ArcInfo was certainly supported on Irix I'd venture a guess and say Erdas Imagine for "heavy lifting" raster. Remote Sensing was such a fun class.

[Waterluvian]

Agreed. Holy cow did I have fun in my remote sensing classes. I'll still remember learning about false color composites from landsat ETM+ data. The first time vegetation just popped out and I was hooked.

My guess is on Erdas Imagine too.

That or some more programmatic stuff like an OGR/GDAL pipeline.