Determining North Small 320×196 Medium 640×392 Large 1024×627 Download Tiff Original 2400×1470 | (223.2 KB) Description The diagram shows how to determine North by sun and plumb line. Keywords direction reading, finding north, sun and plumb line Galleries Geography Source: Chief of Engineers Advance Map and Aerial Photograph Reading (Washington, DC: United States Government Printing Office, 1941)
