Commons talk:Geocoding

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Low-precision co-ordinates[edit]

Are co-ordinates with 1km precision of any value? I ask because my Geograph Update Bot is correcting the co-ordinates of images copied from Geograph Britain and Ireland, and I'm not sure what it should do when the source co-ordinates only have precision of 1km. The simple approach is to generate {{Location}} and {{Object Location}} with prec=1000, and this is what the bot did originally. This seems to have been unpopular, though, so maybe the bot should remove all 1km-precision locations derived from Geograph, or maybe it should do something more subtle. As an indication of scale, there are about 100,000 images where both object and camera locations have 1km precision, and another 150,000 where the camera location is only recorded to 1km precision but the subject location precision is 100m or better. --bjh21 (talk) 22:40, 7 December 2017 (UTC)

Since "At the moment this parameter only affects the display of the coordinates.", I think it could be ditched altogether. As to whether we need geocoordinates to the level of the third quark on the left in the 13th atom of the left leg of the third ant on the right on the mantelpiece of the cottage, I find 5 decimal points to be adequate to about a metre. Rodhullandemu (talk) 22:51, 7 December 2017 (UTC)
The problem here is that I don't have locations accurate to a metre; I have locations accurate to a kilometre and I'd like to know what people think I should do with them. Omitting "prec=1000" might hide the problem, but the locations would still be up to 700m adrift. --bjh21 (talk) 12:34, 8 December 2017 (UTC)
I would use {{Object Location}} as oppose to Camera {{Location}}, so both do not try to place them on a map, and I would keep "prec=1000" parameter so people can see that locations are not very precise. --Jarekt (talk) 16:46, 8 December 2017 (UTC)
I like that plan, at least for those images where the camera and object locations are in the same gridsquare (which will be the vast majority). --bjh21 (talk) 17:56, 8 December 2017 (UTC)