Op 31/07/2022 om 02:40 schreef Josh English:
> Some time around 20 years ago I had a system by which I could download 
> USGS topographic data and convert it to a POV-Ray height field. This was 
> on a Macintosh running OS 9, I think.
> I am now on Windows 11 and I have lost all of my old POV-Ray files for 
> reference.
> I think it was a .DAT file or .DOT file that I had to convert.
> 
> Does such a thing exist anywhere anymore?

Yeah... I did that too, and I still have some .DEM files from the USGS. 
There was a conversion program, iirc... GZIP386.EXE possibly? but which 
cannot run any more on modern windows pc's it seems.

This is all I can remember presently. I 'll get back if I fond something 
useful.

-- 
Thomas

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