It's amazing what comes out of very simple thoughts. I was embarking upon a post on A Hebridean in New Zealand with the statement that the coastline of New Zealand is [a number to be looked up] kilometres long. When I came to look the figure up I discovered that it's not quite as simple as I thought. The coastline of NZ varies in the Wikipedia article on
List of countries by length of coastline from 9th place with a coastline 15,134 km long using one source to 17th place with a coastline 17,209 km long using another. The first source was
The World Factbook and the second
The World Resources Institute. If you happen to be interested in more detailed information then you can follow the links. I've just spent a very interesting time doing just that. It all boils down to the use of straight lines to measure the coastline and the length of those lines. The shorter the line the more accurate the figure and the longer the coastline.
For those who play in pub quiz teams (here's one for you Meike) Canada has the longest coastline using either measurement.
How about this for an interesting (and totally useless) piece of information: The country with the coastline to highest land mass ratio in the world is the
Coral Sea Islands with a landmass >3 km², a coastline of 3,095 km and a land/coast ratio of >1,000,000. Next, wait for it, comes the Spratly Islands with a landmass >5 km², a coastline of 926 km and a land/coast ratio of ≥200,000.
The where? I have to confess never even having heard of the
Spratly Islands. It turns out that they are not a country as such and have no native inhabitants. However about 45 of the islands are occupied by relatively small numbers of military forces from China, the Taiwan, Vietnam, the Philippines, and Malaysia.
Well didn't you just want to know all that?