[OSM-talk] Removing ways in Potlatch

[John Smith]

On 21 June 2010 21:03, Chris Hill <osm at raggedred.net> wrote:
> And exactly how do you propose that we get accurate coordinates for the
> positions of streets in 1665 other using a modern surveyed overlay? I
> don't think Samuel Pepys supplemented his diary with GPS derived WGS84
> coordinates. :-)

Doesn't most countries have their own datum that is fixed to the
tectonic plate and they keep track of this in relation with WGS84?