Howdy folks.
I have a client who is trying to figure out what the symbol “T” means on a USGS topographic map (see below). The map is from 1940 and I don’t see any interpretation of it on the USGS key of symbols (https://pubs.usgs.gov/gip/TopographicMapSymbols/topomapsymbols.pdf). My suspicion is a transmission or telephone line, but that’s only a guess. Thanks for your help.
David Hodnefield
President
952-253-2004 ext 111
Historical Information Gatherers (HIG)
Ryan Mattke
Map & Geospatial Information Librarian
Adjunct Faculty, MGIS Program
Project Lead, Big Ten Academic Alliance Geospatial Data Project
Co-Director, Mapping Prejudice Project
Phone: 612.624.5757