Drag the red marker on the left map to where you want a grid reference. (Only valid in UK OS region)
The grid refs will appear on the right, and the corresponding boxes are drawn on both maps.
Please do not record using 2km or 10km grid refs. These are for information only.

On the left map press "Satellite" for aerial photos only, or "Map" for Google Maps only.
The VC30, Bedfordshire and Accessible Wildlife Site boundaries only show on the left map (at present...)

The right map shows Ordnance Survey maps of different scales according to the zoom amount.
Ordnance Survey limits the number of map tiles accessed per day, so the right map will stop working if this is reached.

The right map tracks the left map whenever it is zoomed, panned or the marker moves, but the right map can be can be zoomed and panned on its own.
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 "Get The Marker" button moves it to the centre of the left map, so match the maps first.
The marker on the right map cannot be dragged.

The "Go to ..." box can be used to go to a Grid reference (e.g. TL123456), or a postcode e.g. (MK41 9SH), or a place name. (Currently it goes to the first matched place name, but a choice will eventually be offered - bear with me).

The "mono" map version of this tool can still be accessed HERE if you prefer it.

To remember a location for future use, right-click over "Link to this location", select "Copy Link Location" (Firefox) or "Copy Shortcut" (IE), paste it into your browser's web address field, then bookmark it. Build your own set of bookmarked locations. You can also paste it into emails, or use in links on a website. (The zoom, aerial and resolution settings are copied too!).
If you find this tool slow and jerky with Internet Explorer, try Firefox, or Chrome or Opera, which are all much smoother and faster on my PC.
Showing boundaries slows the map update process, considerably with Internet Explorer. Turn them off while moving and zooming the maps if you find this to be a problem. Boundary names can be found by clicking on them (unless using IE).

Want to plot a set of records on Google Earth? Use our simple interface HERE

Please be aware that the Bedfordshire Boundary and the Accessible Wildlife Site boundaries (which are dated 28/11/2007) were under Bedfordshire County Council licence and we are required to display the following:
© Crown copyright. All rights reserved (licence 100017358) (2007)

No rights of access to sites are hereby granted. Access to sites may expire or be rescinded. Visitors to sites must abide by any access conditions indicated by landowners or managers. Boundaries are approximate. The information has been made available to the BNHS by the BRMC in association with the Greensand Trust. While every effort has been made to ensure details are correct there may be inaccuracies within the information presented. If you find any issues please report them to the BRMC.

Special permission was sought and obtained from the NBN Trust to make vice-county 30 boundary available on Google Maps. This has been granted for individual use and non-commercial purposes ONLY. We are also required to say that digital VC boundaries were developed under contract and funded by Defra, Scottish Natural Heritage and the NBN Trust, and to display the following.

Digital Watsonian Vice-County Boundary Data

© All rights reserved. National Biodiversity Network Trust and Crown Copyright 2003, comes with ABSOLUTELY NO WARRANTY. This product is available for not-for-profit use to support biological activities strictly under licence with the NBN Trust.

The use of Ordnance Survey OpenSpace is subject to this End User Licence Agreement

Note to webmasters:

Basic instructions for including the code within a website have been provided HERE

The javascript in this application is released under the GNU General Public License Version 2.
Many thanks to Jonathan Stott for making his coordinate conversion code available!

I'm pleased to report this tool is being adopted by other webmasters and can also be found at:

Warwickshire Butterfly Conservation
Lothian Wildlife Information Centre
UK Butterflies
North East England Butterfly Conservation
Cambridgeshire and Essex Butterfly Conservation

Please email me (Keith Balmer) if you also adopt it...