[MapServer-users] rotate pie chart / start at 12 o'clock

[Jörg Thomsen (WhereGroup)]

Hi Jukka,

thanks for the answer! It is better to know what does not work than not 
knowing if. And sometimes there are undocumented features or hacks.
And you are right, 45° != 90°

I wonder whether starting pie-charts at 3 o'clock is the international / 
american / french way to start with the first wedge? I've learned to 
start at 12 o'clock, QGIS starts at 12 o'clock. Why doesn't MapServer?

Regards, Jörg

Am 17.03.25 um 14:13 schrieb Rahkonen Jukka:
> Hi,
> 
> I do not really know, but I do not find such option from the documentation https://mapserver.org/output/dynamic_charting.html.
> I can see something about starts and angles in the source code
> 
> https://github.com/MapServer/MapServer/blob/530f2bfdd99f27541ea9d08dc043d7e3c1e8f38c/src/mapchart.c#L257
> 
> So, now you have an answer, but I fear I could not make you much happier. BTW there may be more than 45 degrees between 3 o'clock and 12 o'clock, but it does not matter.
> 
> -Jukka Rahkonen-
> 
> 
> ________________________________________
> Lähettäjä: MapServer-users käyttäjän Jörg Thomsen (WhereGroup) via MapServer-users puolesta
> Lähetetty: Maanantai 17. maaliskuuta 2025 14.48
> Vastaanottaja: mapserver-users at lists.osgeo.org
> Aihe: [MapServer-users] rotate pie chart / start at 12 o'clock
> 
> 
> Hello,
> 
> here again my so far unanswered question (I apologize for overlooking
> the answer, if there was one):
> 
> is it possible to rotate a pie chart by -45 degree?
> The first piece of cake should start at 12 o'clock, not at 3 o'clock
> 
> Jörg
> 
> _______________________________________________
> MapServer-users mailing list
> MapServer-users at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/mapserver-users
> 
> 
> 

-- 
Viele Grüße,
Jörg Thomsen

---------------------------------------------
WhereGroup Shorts 2025 - am 15. Mai
Im Fokus: PostgreSQL & PostGIS
Online als ZOOM-Meeting

https://wheregroup.com/shorts/
---------------------------------------------



Jörg Thomsen
WhereGroup GmbH
Bundesallee 23
10717 Berlin
Germany

Tel: +49 (0)30 / 5130 278 74
Fax: +49 (0)30 / 5130 278 11	

joerg.thomsen at wheregroup.com
www.wheregroup.com

Geschäftsführer:
Olaf Knopp, Peter Stamm
Amtsgericht Bonn, HRB 9885