Does anyone know where to find map keys for the ancient maps from the 18th and 19th century? Digimap Community Q & A › Category: General Questions › Does anyone know where to find map keys for the ancient maps from the 18th and 19th century? 1 Vote Up Vote Down Anonymous asked 5 years ago I am using historic maps to analyse shoreline recession and it would be helpful to know what symbols indicate the top and bottom of cliff.
Anonymous