HomeRoutesPlaces of interest



GB |

Public | Dutch

Source: Lars Lentz

You would think that measuring heights of hills and mountains would be obvious and simple. But it isn't because the zero level is not that obvious. The UK's mapping agency, Ordnance Survey, measures altitude with respect to the mean sea level as calculated during the first world war here at Newlyn. But did you know that the sea level has risen there since by about 20 cm. So the height of Mount Snowdon is really 20 centimeters lower than marked on the map.


United Kingdom

More about this place of interest

Routes nearby

Related channels

Just like any other website, RouteYou makes use of cookies and similar technology to collect information about your preferences and your usage of the website. Only by doing so can we offer you an optimal user experience.

We also use cookies to serve you with personalised advertisements. Advertisements are necessary in order to offer you this service for free. If you prefer to use the website ad free, then you have the option to upgrade to a paid MyRouteYou Plus account, which also offers some advanced functionality.

Whatever you choose, we will always respect the privacy and security of your information in accordance with our privacy and cookie policy.

How do you want to continue?

I agree with the privacy and cookie policy and

© 2006-2018 RouteYou - www.routeyou.com