WWI Marginal Information

Interpreting Marginal Information

To make sense of the information provided in the margins of a typical "Trench" map, click on any item in the diagram below for an explanation.

corner coordinates	scale	trench date	series name	edition number	sheet number	corner coordinates
						index to adjoining sheets
						compilation diagram
						magnetic north & grid north arrows
corner coordinates	GSGS number	references	instructions for grid squares	conversion table	contour interval & scale	base map date