Robin Paulson wrote: > On 11/01/2008, Martijn van Oosterhout <[EMAIL PROTECTED]> wrote: > >> - The border of a country is not the coastline, but (at the very >> least) 12 nautical miles from the coastline and in some places, much >> further than that. >> > > ok, let's say i wanted to use this as a basis for drawing the national > boundary for a country. i appreciate that part of the border will be > more than 12nm away from the coast (depending on the depth of the > ocean floor, yes?), but it's a good start > Just as a curiosity: 12 NM was chosen because it it the farthest point a person can see from the shore (due to Earth's roundness). Or something like that :) > does some enterprising coder want to come up with a way of > automagically drawing the border at a 12nm offset to the coastline? > anywhere that the border is different, i would be happy to edit it > manually, if a large part of it was being done by programmatic means > > That would be an interesting thing to implement. It would involve creating a union of circles (with radius of 12 NM) and then determining the border of that union. If only I had the time... :)
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