topic Re: what is a .GP4 typr file in Installation & update

what is a .GP4 typr file

Aussie John — Fri, 28 May 2004 03:56:53 GMT

Hi Ive been given some archived filed some are dwg others .gp4. Im on a Mac - is there any way to view these?
Also i have virtual PC at a pinch

Re: what is a .GP4 typr file

Rob — Fri, 28 May 2004 04:23:55 GMT

John,

it is a type of not really popular compressing algorithm called 'CCITT Compressed Group 4' and used mainly for compressing of TIFF images. As I can remember you can find a decompressor at http://www.leadtools.com/ (I think)...

Re: what is a .GP4 typr file

Ben Odonnell — Fri, 28 May 2004 07:55:56 GMT

Or more commonly known as a CALS file. It is a file formate that was developed by the US military. The reason they are commonly used is it that they are scalable, your can even measure them and do area take off's.

CALS file have actually become a stand archiving file format here in Sweden. I think that AutoCAD supports it of of the box, though I could be wrong. It woks much in the same way as PDF, in the seance that it's a virtual printer.

Cheers.
Ben

Re: what is a .GP4 typr file

Aussie John — Fri, 28 May 2004 08:35:12 GMT

are there any freeware readers?