Six Inches to 1 Mile
Blackadder will be adding content over time
Published by the Ordnance Survey from the 19th Century. Early non OS grid version (County Series) to the Cassini projection and later OS grid versions.
Scale 1:10,560 (Exactly 6-inch to 1 mile)
Sheets coverage of the later versions is 5km x 5km. These are known as quarter sheets, there being four sheets (NW,NE,SW,SE) for each standard sheet reference (eg. SP 48 NW, SP 48 NE, SP 48 SW & SP 48 SE).
The collection obtained by blackadder is from the late 1950's onwards. For earlier County series maps prior to the 1960's please see the National Library of Scotland collection.