Does anyone know where to find map keys for the ancient maps from the 18th and 19th century?

 
Digimap Community Q & ACategory: General QuestionsDoes anyone know where to find map keys for the ancient maps from the 18th and 19th century?
Anonymous asked 4 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.

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