[OSM-talk] Question about contributor terms and derived contributions
Andreas Perstinger
andreas.perstinger at gmx.net
Thu Jun 16 19:38:10 BST 2011
On 2011-06-16 19:15, David Earl wrote:
> 2011/6/16 Andreas Perstinger<andreas.perstinger at 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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