Using the Locate page

The Locate page allows you to find locations on a map and to lookup and verify grid-references and positional information.  You can also use this page to convert postcodes and (latitude, longitude) positions to grid-references simply by looking them up.  You can also find the height at any point.


  • Zoom in or out using the + and - buttons on top left of map, or use your mouse wheel.
  • You can scroll by dragging the map with your left mouse button down.
  • Click buttons on top right to choose between normal map, aerial photography, 'hybrid' (which is a combination of normal plus aerial) and terrain.
  • If you click anywhere on the map that position will be saved below the locate box.  You can select any part of this and then right-click and copy to paste elsewhere.  This is shown in Tetrad, 6-figure, 10-figure, (latitude, longitude WGS84) and elevation above sea level (or depth below) in metres.
  • Enter any location or position you wish to find in the box below map (see Notes below for more details).
  • Click a location point marker for details of that location.
  • Drag and drop the man icon (top left) to go into Street View mode (coverage is highlighted in blue).  Exit street view and return to map by clicking 'x' button in top right corner of image.
  • Click the 'Back' button in your browser if you need to return to the previous page.


Enter any search criteria in the box below the map and press enter or click the Locate button.  You can search using grid-references, postcodes, road names, towns, place names etc.  It may be helpful to construct a search as "road, town" or "road, town, county".  If you are having problems with a location being found outside the UK add a , UK to the end of your search (like "Boston, UK" or "Boston, Lincolnshire").  The page is designed to work everywhere in the world with an emphasis on your location.

Grid-references are located by their origin or lower left corner of the grid square.  The grid-square is shown in highlight so you can see the area defined by the reference at its given accuracy.  Note that these are not necessarily 'squares' on the maps as projected but they do show the true extent.  You can enter grid-references in any precision to 10 figures (ST to ST1234512345) and also as tetrads (ST51A) and 5km format (ST51SW).  Irish National Grid-references and Channel Island Grid-references are supported to similar precisions.

If the location can't be found then the caption at the top of map will show 'Location not found'.

Click 'find me' at the top right of the map to try and locate your position now.  Requires a geolocating browser and your permission.

Locate is based on Google Maps.  Accuracy of the maps is unknown but considered to be better than +/-10m across the UK. Google Maps use latitude and longitude in WGS84 and conversion to and from our grid-reference systems (GB and Irish) uses standard published formula with a conversion accuracy of +/-1m.  Height uses the Google elevation service and again accuracy of this is unknown but considered to be typically better than +/-10m.

Calls to the Locate page

You can call, or refer to, the locate page with a subject to locate using the following format.  This could be useful for passing on links to locations in emails etc.


Where "position" is either a named location or a grid-reference and "name" is an optional object name or caption for this position.  Examples (click links below to try out then use the back button in your browser to return here): link of Dublin link

If you locate on a subject as a place name the page will show the map view by default, if you locate on a grid-reference the page will show with the aerial view.

Go to Locate.