[Qgis-user] scae on map composer

[Matt Boyd]

It's all to do with the map units.
If your working in a projected (ie feet, meters etc) then the map
units are very small compared to the scale of the map.

Segment size (map units) : This is how long each segment in the scale
bar will be, a 5km long segment would be 5000 (ie 5000m because your
projection is in meters)
Map units per bar unit : if you want to display in km, then you'd put
a bar unit at 1000 (5000/1000 = 5km).

In short, you need to adjust the above parameters to suit the
size/scale of the area you're creating a map for.


On Thu, Oct 25, 2012 at 2:31 AM, michael chiverton <qgislist at gmail.com> wrote:
> Hi All,
>
> Why is it that sometimes when i add a scale bar to my maps in the map
> composer it indicates a 0.  How do i assure this does not happen is it
> somthing in the qguis map field or is it an issue with the composer?
>
> thanks,
>
> Mike
>
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