Hi Flore,
Are you absolutely sure that the printer is not scaling during the
printing? Many printers "autoscale" and shrink the content, because they
think that there is content right to the edge (even if it is just
white-space). In such case, you can often force the printer to turn off
auto-scaling through some printer setting (e.g. print at 100%).
Another source of confusion regarding printing at scale is the
coordinate system. What coordinate system is your data in and what
coordinate system are you using in your project? Anything lat/lon should
be converted into a projected coordinate system, before trying to print
at scale.
If you double checked that and can confirm that it is not the fault of
some printer setting, than you should file an issue report at
https://issues.qgis.org/ and we can find a developer to look at the
issue. Best, if you could provide a sample data and project to reproduce
the issue.
Greetings,
Andreas
On 2018-10-15 16:36, Flore Cotton wrote:
> Hi,
>
> I have a problem with printing a map on the right scale (Qgis2.18.24).
>
> If I put the map in the print composer on an A4 format, I change the scale
> (for example 1000), and I print the pdf, it is printed on the right scale. (I
> recalculated it, by measuring a specific distance in qgis and then on the
> pdf).
>
> Now, our map is very detailled and we need those details in good quality. So
> we need to print the map on format A0, to have the best quality. If I do the
> same as before (change scale, print on pdf), the scale isn't right on the
> pdf. Instead of scale 1/1000, I get some scale in my recalculation.
>
> Do you know what the problem is, or what did I do wrong?
>
> Thank you,
>
> Flore
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