Conventional signs for the draftsman
A military manual of map symbols published by the U.S. Army Corps of Engineers in 1825, made for topographical draftsmen to standardize how terrain features are drawn. The single plate shows rows of small hand-drawn conventional signs for crops, gardens, orchards, woods, marshes, rocks, and water. A designer could take from it a compact system of repeated pattern marks and labelled symbols for showing land types on a schematic map.
