On Fri, 19 Apr 2019 at 07:26, Christoph Hormann <o...@imagico.de> wrote:
> On Thursday 18 April 2019, Kevin Kenny wrote: > > > And how do you verifiably determine if two things are part of the > > > same physical object? > > But as already hinted i am not sure if the Drake Passage is something i > would consider mappable in OSM based on local knowledge. > But, without wishing to sound facetious, how do we then have coastlines for Eurasia, Greenland & Antarctica mapped? *Nobody* has "local knowledge" of the full coastline of any of them, & for Greenland & Antarctica, what is mapped - the ice cap, which is constantly moving, or the deep underlying rock? Should we erase them off the map as they're not "verifiable"? Thanks Graeme
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