Focus on
The birth of the travel guide
In the 19th century travel evolved from an aristocratic privilege to middle-class reality. Explore how rail guides made this possible.
Series
Ordnance Survey: Trigonometrical and Levelling Divisions: Levelling Final Values
Catalogue reference: OS 55
What's it about?
OS 55
Records from the Third Geodetic Levelling of Great Britain by the Ordnance Survey. These files contain the information relating to the checking and application of the data collected in the field. They include locations of spot heights, bench...
Full description and record details
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Reference (The unique identifier to the record described, used to order and refer to it)
- OS 55
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Title (The name of the record)
- Ordnance Survey: Trigonometrical and Levelling Divisions: Levelling Final Values
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Date (When the record was created)
- 1951-1968
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Description (What the record is about)
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Records from the Third Geodetic Levelling of Great Britain by the Ordnance Survey. These files contain the information relating to the checking and application of the data collected in the field. They include locations of spot heights, bench marks, and precise levels as well as the rounded levels shown on published mapping. The series also includes field guide cards, and field diaries.
New infill levelling is also included in this series. This was undertaken for a more detailed analysis of a particular area in response to land use change or for particular projects. Examples are Jodrell Bank Radio-telescope and the cross Channel data required by the construction of the Channel Tunnel.
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Legal status (A note as to whether the record being described is a Public Record or not)
- Public Record(s)
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Language (The language of the record)
- English
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Creator(s) (The creator of the record)
- Ordnance Survey of Great Britain, Directorate of Field Survey, 1946-1973
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Physical description (The amount and form of the record)
- files and papers
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Access conditions (Information on conditions that restrict or affect access to the record)
- Records not yet transferred
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Subjects (Categories and themes found in our collection (our subject list is under development, and some records may have no subjects or fewer than expected))
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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C16179/
Catalogue hierarchy
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You are currently looking at the series: OS 55
Ordnance Survey: Trigonometrical and Levelling Divisions: Levelling Final Values
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