This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Cville XII trenchmap. Donald Coho created this file from scratch He releases it to the public domain for free use There is no copyright and attribution is not expected It was drawn using CAD program overtop of USGS topographic map then the topographic map was deleted Because of the precision of the topographic map it is more accurate