![]() ![]() Whilst this can be very accurate, it might just dump the marker in the next town where your IP is located!Įven a good GPS can be inaccurate if the signal is weak or non-existent, Location Services will work even on computers with no GPS, but only by locating your Internet Provider or IP address. Only a good built-in GPS is worth using to get a grid reference. Or asking about Google's Location Services, or similar. If you haven't done this before, a box will come up, either asking you to share your location, centre of the map) looks OK, click a second time to centre the marker and show the grid reference. (click to hide) Using geolocation with Grab a Grid ReferenceĬlick on the geolocate now button to centre the Google map on your current location. Mobile browsers will work but may look a little cramped on a small screen. Earlier versions are functional but the site layout may be a bit sketchy-looking. Grab a Grid Ref has been tested on a range of browsers and found to work on all except earlier versions of Internet Explorer (v9 and earlier). If not, you should be able to enable it in the Settings menu of your browser. It won't normally be a problem, as most browsers have Javascript enabled by default. Without it the maps will be blank, the info boxes won't hide on clicking and the tools won't work. IM5 1AU), or a placename - but note that it currently goes to the first matched placename rather than a choice, so you might prefer to use postcodes where available.Īs with most online maps, you will need to have Javascript enabled to get the benefit of this page. The Search for: box can be used to search for locations, either by a Grid reference (e.g. You can use this to get a quick idea of your changing OS grid reference, by substituting the main letter prefixes for the first number of each coordinate - for example, Easting:2xxxxx,Northing:4xxxxx lies within the SC 100km square, so a reading of E:228600, N:470000 is equivalent to SC286700. The right-hand map also has a coordinates tracker in the bottom left corner. ![]() The "Get The Marker" button moves the marker to the centre of the left map, so you may want to match the maps first. If you've found the place you wanted using the right map, you can move the left map to it using the "Match Left Map to Right Map" button. The right-hand map copies the position of the left-hand map whenever it is zoomed, panned or the marker moves, but the right map can be can be zoomed and panned on its own. Ordnance Survey limits the number of map tiles that may be accessed per day, so their map will stop working if this is reached. This includes the nice OS Landranger maps familiar to walkers and tourists. The right-hand map shows Ordnance Survey maps of different scales according to the zoom level. Note that the more detailed layers may load slowly and take a while to appear, especially on older systems or slower internet connections. If you pan away from the marker, click "Go to marker" to get back to it.Īdditional boundary layers can be ticked on and off. against GPS readings.Ĭlicking on "Get the marker" will bring it to the centre of the map. Note that the grey box also has a full digital Easting/Northing option, plus a Lat/Long option, for checking e.g. Click the "About grid references" button for more information. Tick your choice(s) of grid reference from the grey box. The grid references will appear in the grey box below and the corresponding size and colour of grid square is drawn on both maps. It also tracks the zoom level - but note that the Google map on the left will zoom in closer than the OS maps. The blue marker on the right-hand map tracks the red marker and cannot be dragged. ![]() ![]() Otherwise you can proceed without using the geolocation facility.ĭrag the red marker on the left-hand map to where you want a grid reference ( see below for more about grid refs). Check out the using geolocation button below for more details. smartphones - you may be able to use the device's built-in geolocation. On devices with GPS and newer browsers - e.g. The maps are based on the Grab a Grid Reference site by Keith Balmer at Bedfordshire Natural History Society and adapted for use in Somerset by SERC (see Acknowledgements, below). The maps below provide Ordnance Survey (OS) grid references and a range of site boundaries for use with surveying and recording wildlife in the Somerset. (click anywhere on an info box to hide it) Using Grab a Grid Reference - dual map version ![]()
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