mud map

mud map

n
(Physical Geography) informal Austral a map drawn on the ground with a stick, or any other roughly drawn map
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Each entry includes cross reference to relevant navigation charts, Australian National Tide Tables, a brief description of the anchorage, and a mud map (a rough sketch to be used as a guide only).
For a large spreadsheet they should also include a mud map of how the sections are laid out.
My plan was to implement handwritten essays in the field; mud maps and the "crafting of things" on a grand scale.