[Qgis-user] Measurement differences between GIS and paper space.

[C Hamilton]

I'm curious how well the "Shape Tools" plugin's geodesic measure tool would
work. It is WGS84 rather than GRS80, but the difference is very small
between the two.

On Mon, Apr 30, 2018 at 12:03 PM, Tyler Veinot <tylerkveinot at gmail.com>
wrote:

> Hello;
> I am using a stereographic projection in QGIS, EPSG 2954 to be specific
> PEI, and I noticed that when I measure distances in the map using GRS80
> ellipsoid they are quite different from when I print it out on paper at say
> 1:500 and measure with a scale. For example a pipe segment in the GIS
> measured 86m but when printed and measured with a scale it showed up as
> 96m. Did the same thing in a PDF and used the PDF measure and scale tools
> with the same result. Got nearly the same result in ArcMap as well. It
> seems like that is quite a lot of discrepancy and I am wondering if anyone
> has any insights on this?
> Thanks
>
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