I've been searching for a few days for the most accurate world coastline datasets.. Does anyone know where l can get coastlines at scales of 1:250 000, 1:2 000 000 and 1: 70 000. I've tried using the NOAA NGDC extractor but my 1:70 000 medium resolution coastlines only cover the US and the rest of the world is omitted.
I already have 1: 1 000 000(VMap0). Please point me in the right direction of where l can easily download good quality large-scale global coastline datasets.
Any help will be greatly appreciated