On 2011-06-16 19:15, David Earl wrote:
2011/6/16 Andreas Perstinger<andreas.perstin...@gmx.net>:
If there is just *one* single object near your way which isn't based on a
ccbysa node/way, then you could always argue IMHO that you've measured the
location of your way from this object (JOSM has a measurement tool with you
can use for distances and angles).
That's the whole basis of how Walking Papers works (no measuring tool
involved) - you locate new items by referring to the existing data.
And it is also Ordnance Survey's oft-stated contention that this is
indeed derivation - if you geolocate a photo by reference to map
features, that is derived.
That's why you need one object which isn't based on restrictions as I've
said (more accurate: you need two points of a baseline). The rest is
simple trigonometry.
Bye, Andreas
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