[OSM-talk] The coast is clear (almost!)

Andy Allan gravitystorm at gmail.com
Tue Jan 20 19:27:43 GMT 2009


On Tue, Jan 20, 2009 at 6:53 PM, Ævar Arnfjörð Bjarmason
<avarab at gmail.com> wrote:

> The PGS import is wildly inaccurate in places, it didn't catch small
> (and often several sq km) islands, confuses rivers for ocean etc.
> Afaik the only viable way to fix this is to manually go over it and
> draw it anew based on landsat imagery.

I've been doing that a bit around Canada - initially in order to help
with previous coastline 'inversions' but the work I was doing showed
me how farcical the initial import could be. The world does not have
staircase-like coasts! Tracing over the landsat is boring but one of
these therapeutic things in life, and in far-flung places the
coastline of alternative map providers is much, much worse.

The global 5m-ish coastline that does/will exist in OSM even on its
own is a massive public good.

Cheers,
Andy




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