Thanks to the pointer, Katie. I meant to look into Max' work for a while, but failed. Now I did and asked him many questions :)

So the biggest difference is that Max uses "dim" to represent what we mean here with "precision". And "dim" is somehow related to "precision" in a globe dependent way (which is fine) -- or differently put, "dim" is what Gregor would prefer here, since it is measured in Meter.

Otherwise it looks pretty much the same.

I still would prefer "Arcdegree of the equator of the given globe" over "Meter", as it allows to measure any globe without having too much details about the globe. but otherwise it seems like the same things. (And they can be transformed from one to the other using a simple factor).







2013/1/8 Katie Filbert <katie.filbert@wikimedia.de>
On Tue, Jan 8, 2013 at 1:54 PM, Nikola Smolenski <smolensk@eunet.rs> wrote:
On 08/01/13 12:36, Denny Vrandečić wrote:
Location:
<https://meta.wikimedia.org/wiki/Wikidata/Development/Representing_values#Geolocation>

I'm not sure if we should be going that far, but there may be cases where longitude and latitude are known with different degree of accuracy, so multiple precisions might be needed.

I think it's worth taking a look at what MaxSem has done with the GeoData extension, which is used for mobile apps, etc.:

https://www.mediawiki.org/wiki/Extension:GeoData

GeoData uses globe, as that's consistent with how coordinate templates are done now on Wikipedia.  I think starting simple and consistent with GeoData and the coordinate templates is good.

If no "globe" parameter is specified in the coordinate template, then Earth is assumed (and lat/long -- WGS84).

For the moon, selenographic coordinates are assumed and there are other reference "globes" for other planets and moons.

http://en.wikipedia.org/wiki/Selenographic_coordinate

Perhaps things can get more complex later and having WGS84 coordinates wouldn't interfere with that.

Cheers,
Katie
 


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