This sight will convert T/R to lat/long for some areas
in the US:
http://www.crl.com./~wefald/trs2ll.html
Unfortunately, it does not cover my area (MO) and it's
accuracy may not meet your standards.

I recently wrote an Excel spreadsheet that gives the
7.5' topo name for a lat/long.  I plan to expand it to
the whole USA soon (can easily be done, at least for
states that have full 7.5' topo coverage).  If you need
this spreadsheet I can send it to you.  Just state your
Excel version number.
 

Mike Flannigan
 
 

Subject: Township/Range System vs. USGS quads <fwd>
Date: Thu, 3 Feb 2000 12:42:09 -0500
From: Johnnie Sutherland <[log in to unmask]>

Maps folks,

Hope this is not too elementary for you all but...given a Township
and Range System number for a section map, such as T16S R16E S34
in Levy County Florida, how does one know which 7.5 min quad(s), or
other scale, would cover the area of this section?

I pretty much know how the Township and Range System works but don't
know how to cross reference a T&R number to the topos.

TIF,

Rick

Richard Stringer-Hye <[log in to unmask]>