[Qgis-user] Example of triangular legend

[Nyall Dawson]

On Mon, 17 Jun 2024 at 09:36, Grant Boxer via QGIS-User
<qgis-user at lists.osgeo.org> wrote:
>
> See attached image.
>
> Any thoughts on how we might do this in QGIS?

I'd just make a SVG version of this as a static image, and insert it
as a picture element in the layout.

Nyall

>
> Grant
> Perth Western Australia
>
> -----Original Message-----
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> Today's Topics:
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>    1. Triangular Legend (Drew French)
>    2. Re: Triangular Legend (Phil Wyatt)
>
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Sat, 15 Jun 2024 16:51:57 -0500
> From: Drew French <fullboarfarm at gmail.com>
> To: QGIS List <qgis-user at lists.osgeo.org>
> Subject: [Qgis-user] Triangular Legend
> Message-ID:
>         <CAA0tCbAuVg=PCV02W+7HFpbjkXyeSozKP=sH4J8gj=OTmdgMSA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
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> Do you have a sample image?
>
> On Sat, Jun 15, 2024 at 2:00?PM <qgis-user-request at lists.osgeo.org> wrote:
>
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> > Today's Topics:
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> >    1. Triangular Legend (boxerg at iinet.net.au)
> >
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> > Message: 1
> > Date: Sat, 15 Jun 2024 14:26:06 +0800
> > From: <boxerg at iinet.net.au>
> > To: <qgis-user at lists.osgeo.org>
> > Subject: [Qgis-user] Triangular Legend
> > Message-ID: <00b001dabeec$e80ff490$b82fddb0$@iinet.net.au>
> > Content-Type: text/plain; charset="us-ascii"
> >
> > I am producing ternary radiometric images where potassium is shown in
> > red, thorium shown in green and uranium shown in blue. In geophysical
> > maps, they commonly have a triangular legend with potassium at the
> > apex and the green and blue at the lower points of the triangle. Hs
> > anyone ever created a triangular legend for an RGB image?
> >
> > Cheers Grant
> >
> > Perth Western Australia
> >
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> --
> Andrew French
> (715) 986-8088
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> Message: 2
> Date: Sun, 16 Jun 2024 18:00:10 +1000
> From: "Phil Wyatt" <phil at wyatt-family.com>
> To: "'Drew French'" <fullboarfarm at gmail.com>, "'QGIS List'"
>         <qgis-user at lists.osgeo.org>
> Subject: Re: [Qgis-user] Triangular Legend
> Message-ID: <001301dabfc3$3c7290c0$b557b240$@wyatt-family.com>
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>
> I suspect this is typical of what is required (maybe not with the text?)
>
>
>
> https://vro.agriculture.vic.gov.au/dpi/vro/vroimages.nsf/Images/landform_rad
> io5/$File/radio_pyrmid.jpg
>
>
>
>
>
>
>
> From: QGIS-User <qgis-user-bounces at lists.osgeo.org> On Behalf Of Drew French
> via QGIS-User
> Sent: Sunday, June 16, 2024 7:52 AM
> To: QGIS List <qgis-user at lists.osgeo.org>
> Subject: [Qgis-user] Triangular Legend
>
>
>
> Do you have a sample image?
>
>
>
> On Sat, Jun 15, 2024 at 2:00?PM <qgis-user-request at lists.osgeo.org
> <mailto:qgis-user-request at lists.osgeo.org> > wrote:
>
> Send QGIS-User mailing list submissions to
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>
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> <mailto:qgis-user-owner at lists.osgeo.org>
>
> When replying, please edit your Subject line so it is more specific than
> "Re: Contents of QGIS-User digest..."
>
>
> Today's Topics:
>
>    1. Triangular Legend (boxerg at iinet.net.au <mailto:boxerg at iinet.net.au> )
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 15 Jun 2024 14:26:06 +0800
> From: <boxerg at iinet.net.au <mailto:boxerg at iinet.net.au> >
> To: <qgis-user at lists.osgeo.org <mailto:qgis-user at lists.osgeo.org> >
> Subject: [Qgis-user] Triangular Legend
> Message-ID: <00b001dabeec$e80ff490$b82fddb0$@iinet.net.au
> <http://iinet.net.au> >
> Content-Type: text/plain; charset="us-ascii"
>
> I am producing ternary radiometric images where potassium is shown in red,
> thorium shown in green and uranium shown in blue. In geophysical maps, they
> commonly have a triangular legend with potassium at the apex and the green
> and blue at the lower points of the triangle. Hs anyone ever created a
> triangular legend for an RGB image?
>
> Cheers Grant
>
> Perth Western Australia
>
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> --
>
> Andrew French
>
> (715) 986-8088
>
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