29th November 2007 - Crosshairs added to each map.22nd July 2008 - Latitude and longitude for the centre of each map is now shown.The nearest country also now displays for both maps 22nd October 2008 - Added dual control so both maps can be the 'driver' and the 'passenger'.14th January 2009 - Added Unlink Zoom option.

21st September 2009 - Removed border around maps for better fit.11th November 2013 - Implemented Google Maps API V3.9th March 2014 - Update to fix bug with crosshairs not appearing on the exact centre of the map.19th November 2014 - Added manual input by latitude / longitude or by place name.14th January 2015 - New option : Keep on the same latitude.3rd May 2015 - Now displays the tunnel distance.15th Octber 2018 - Converted to Leaflet maps.19th November 2018 - Option to flip map2 upside down.6th July 2019 - Added centre cross hairs to center of both maps.23rd January 2020 - Bug fix - issues when starting in Western Europe.31st August 2021 - Bug fix - Prevent map jumping/oscillating after move.The two points which are antipodal to one another are considered to be connected by a straight line or tunnel through the centre of the Earth. An antipode of a point on the earth is the region on the Earth's surface which is diametrically opposite to that point. You can also change the map view using the Map, Satellite and Hybrid buttons. You can adjust the height of the map by using the small, medium and large buttons. To make things easier, you can also zoom the map in and out. In effect it will show you what is at the other side of the earth. When you let go and finish dragging the map the other map will then show you where about's on the earth the far end of the imaginary tunnel will be. Locate Point How to use the Map Tunnelling Toolĭrag map 1 or 2 by clicking and holding the map as you move it. Input the latitude and longitude of a point on the left map and see its corresponding antipode on the right map.

Free google earth map