[Qgis-user] When Measure Tool can return meters nomatter CRS why can't Field Calculator?

[Nyall Dawson]

On 25 Oct 2015 07:44, "magerlin" <MAP at ramboll.dk> wrote:
>
> To get meters from $length in field calculator the layer or project CRS
(if
> OTF is on) has to use the unit meters.
>
> But the Measure Tool can return meters nomatter CRS, so why can't Field
> Calculator?

No reason, except that no one's implemented/fixed this yet.

Nyall

>
> Or rather shouldn't there be a $length(unit) function? (for meters, feet,
> nautic miles etc.)
>
> I can't think of any situation, where a length expressed in degrees is
> usable?
>
> I have searched Grass, OGR and SAGA in Processing but have not been able
to
> find any algorithms returning meters there either?
>
> The might be an issue on accuracy, but if that is just stated I think we
can
> live with that?
>
>
>
> -----
> Regards Morten
>
> Currently using Qgis 2.10.1 (OSGeo4),
> Windows 7, 64bit
> --
> View this message in context:
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