[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



More information about the talk mailing list