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Date: Thu, 7 Oct 1999 08:29:50 -0600 (MDT)
From: Thiry <[log in to unmask]>
Subject: USGS thematic map confusion
Sender: Thiry <[log in to unmask]>



I am confused about the numbering of a couple of USGS I-series maps.

In August of 1997, we received I-2588--"Sidescan sonar image, surficial
geologic interpretation, and bathymetry of the Long Island Sound sea floor
off Haammonasset Beach State Park Connecticut."
I numbering seems correct because I-2589 is a similar map.

But this July we received "Geologic map of the western Ophir Planum region
(MTM-10067) of Mars."  The envelope was numbered "I-2588."  However,
someone at USGS (?) had written, in pen, an "M" after the number.  The
number makes no sense when contrasting it with the previous "I-2588."

I find no other "Ophir Planum" maps in the I-series.

Is the number "I-2588-M" incorrect?  If so, what should the correct number
be?

Thanks in advance.

--Christopher JJ Thiry
Map Librarian
Colorado School of Mines
1400 Illinois
PO Box 4029
Golden, CO 80401-0029

voice:  303-273-3697
fax:    303-273-3199

[log in to unmask]
http://www.mines.edu/library/maproom/
http://www.mines.edu/fs_home/cthiry/
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