To find manually the coordinates of a building I recommend the front door. It has the avantage that a GPS navigation device drives you to the right place and not to the back street. Alternatively, the most prominent point of the monument or just the center.
Vicenē
> Date: Thu, 5 Sep 2013 08:46:40 +0200
> From: vigneron.nicolas@gmail.com
> To: wikilovesmonuments@lists.wikimedia.org
> Subject: Re: [Wiki Loves Monuments] Autofill during upload
>
> In France, it's always the center of the « monument » (could be a
> building or something else, definition of « monument » could be
> strange in strange ; in the cases we didn't find the precise location,
> there is no coordinates).
>
> +1 : {{object location dec}} would be far better than {{location dec}}.
>
> Cdlt, ~nicolas
>
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