GeoFacts from Ordnance Survey

GeoFacts is a resource you can use to search for general map-related information.

Use “Search GeoFacts” on the right of the page by entering a word or abbreviation.  For example Contour  or PH.  Then click “Go” to see what information appears.

Top Facts

Altitude -Alt

Above Ordnance Datum - AOD

The Cassini Projection

The First Ordnance Survey Map   

The abbreviation 'Trig Sta'

Transverse Mercator Projection - TM

Side of River - SR

The abbreviation 'UTM'

Cam, Course of, Centre of, Carriageway, Creek, Cross, Causeway, Chase

Information on the National Grid

Search GeoFacts

All reasonable steps have been taken to ensure that the information contained in these Geofacts is correct, Ordnance Survey does not warrant their accuracy. Please independently verify their accuracy before relying on them.