Talk:Blaeu Atlas of Scotland

Prime meridian
The one map reproduced in this article includes a meridional scale, but its origin, while clearly not at Greenwich, is not specified. Were all the maps in the atlas based off the same prime meridian, or did it vary? And where was this prime meridian? Fierro? Someplace else? --Piledhigheranddeeper (talk) 17:16, 19 May 2022 (UTC)