It looks like the prevailing direction of the wind and perhaps the temperature during various times of the year. Just a guess.
Louise
Louise Ratliff
Social Sciences and Map Catalog Librarian
UCLA Library Cataloging & Metadata Center
2400 Life Sciences Building
Box 957230
Los Angeles, CA 90095-7230
(310)206-5853
From: Maps-L: Map Librarians, etc. <[log in to unmask]>
On Behalf Of Kathy Stroud
Sent: Thursday, January 3, 2019 12:39 PM
To: [log in to unmask]
Subject: Trivia Question - What is this a map of???
I know I’ve seen this map before, but I don’t recall what it represents. Obviously I have something taken out of context.
Kathy Stroud
David and Nancy Petrone Map/GIS Librarian Knight Library
1299 University of Oregon
Eugene, OR 97403-1299
541-346-3051
“A map is not just a picture—it’s also the data behind the map, the methodology used to collect and parse that data, the people doing that work, the choices made in terms of visualization and the software used to make them.”