On Sat, 31 Jul 1999 09:18:19 -0700, David Vincent-Jones wrote:
>I am trying to convert 7.5' SDTS elevation data from
>the USGS site and have used the SDTSEPOV.EXE
>converter from BLM without any success.
>This should give a Targa (POV) output file
>Keep getting error messages "Error reading data record subfield"
>Anybody had a similar problem?

One possibility is that you inadvertantly used a program like
WinZIP that thinks the file it's unzipping is text.  ISO 8211
looks superficially text-like, but there is some binary data 
after the headers, so "intelligent" unzippers will tend to mung
the coordinate data by converting line endings.  

(Oh, God, I thought I'd never have to think about SDTS again.
Unclean! Unclean!)

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