|Number of sheets||360 (planned)|
|Sheet size||18mi × 12mi|
|Projection origin||Delamere (53.221°N|
2.684°W OSGB36 datum)
|Unit of measurement||Foot of O1|
|Map scale||1:63 360|
The 1-inch Fourth Edition was the last to use the ‘small’ 18 × 12-mile sheet lines originally drawn up for the 1-inch New Series. The Fourth Edition maps used the survey information from the third national revision of 1909-1910, which was abandoned. Only seven sheets in the series were ever published, covering part of eastern Kent.
The series was superseded by the introduction of the 1-inch Popular Edition.
Page last updated: 14 April 2012