From craig.leat at gmail.com  Tue Nov  8 10:23:32 2022
From: craig.leat at gmail.com (Craig Leat)
Date: Tue, 8 Nov 2022 20:23:32 +0200
Subject: [QGIS-ZA-user] NTv2 Datum Transformation Grid
Message-ID: <CAAPVWe43A804cCt2n+_Cg2qQ5E+eTwV4ufyMf-SSKtimQeb2fw@mail.gmail.com>

Hi,

I have SG Diagrams using the Cape Datum and I need to transform these to
the Hartebeesthoek94 datum using the NTv2 datum transformation grid. QGIS
can take a custom proj definition with the option
+nadgrids=nameoftheNTv2file.gsb

Does anyone know where I can obtain the NTv2 grid (the .gsb file)? I don't
know if there is one file for the whole country or one for each degree
square.

Regards

Craig
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From lourens at terragis.co.za  Tue Nov  8 10:58:19 2022
From: lourens at terragis.co.za (Lourens van Zyl)
Date: Tue, 8 Nov 2022 20:58:19 +0200
Subject: [QGIS-ZA-user] NTv2 Datum Transformation Grid
In-Reply-To: <CAAPVWe43A804cCt2n+_Cg2qQ5E+eTwV4ufyMf-SSKtimQeb2fw@mail.gmail.com>
References: <CAAPVWe43A804cCt2n+_Cg2qQ5E+eTwV4ufyMf-SSKtimQeb2fw@mail.gmail.com>
Message-ID: <003701d8f3a4$12028210$36078630$@terragis.co.za>

Craig

 

One file for entire country.

Sent via WeTransfer to your e-mail.

 

Kind regards

 



 

From: qgis-za-user <qgis-za-user-bounces at lists.osgeo.org> On Behalf Of Craig Leat via qgis-za-user
Sent: Tuesday, 08 November 2022 8:24 PM
To: qgis-za-user at lists.osgeo.org
Cc: Craig Leat <craig.leat at gmail.com>
Subject: [QGIS-ZA-user] NTv2 Datum Transformation Grid

 

Hi,

 

I have SG Diagrams using the Cape Datum and I need to transform these to the Hartebeesthoek94 datum using the NTv2 datum transformation grid. QGIS can take a custom proj definition with the option +nadgrids=nameoftheNTv2file.gsb

 

Does anyone know where I can obtain the NTv2 grid (the .gsb file)? I don't know if there is one file for the whole country or one for each degree square.

 

Regards

 

Craig

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From craig.leat at gmail.com  Tue Nov  8 22:24:02 2022
From: craig.leat at gmail.com (Craig Leat)
Date: Wed, 9 Nov 2022 08:24:02 +0200
Subject: [QGIS-ZA-user] NTv2 Datum Transformation Grid
In-Reply-To: <003701d8f3a4$12028210$36078630$@terragis.co.za>
References: <CAAPVWe43A804cCt2n+_Cg2qQ5E+eTwV4ufyMf-SSKtimQeb2fw@mail.gmail.com>
 <003701d8f3a4$12028210$36078630$@terragis.co.za>
Message-ID: <CAAPVWe5J-TOk1yKfE1gMxZrgaV7c4SROyRvcp=eM4E7Z-cgqug@mail.gmail.com>

Thanks so much Lourens!

On Tue, 8 Nov 2022 at 20:58, Lourens van Zyl <lourens at terragis.co.za> wrote:

> Craig
>
>
>
> One file for entire country.
>
> Sent via WeTransfer to your e-mail.
>
>
>
> Kind regards
>
>
>
>
>
> *From:* qgis-za-user <qgis-za-user-bounces at lists.osgeo.org> *On Behalf Of
> *Craig Leat via qgis-za-user
> *Sent:* Tuesday, 08 November 2022 8:24 PM
> *To:* qgis-za-user at lists.osgeo.org
> *Cc:* Craig Leat <craig.leat at gmail.com>
> *Subject:* [QGIS-ZA-user] NTv2 Datum Transformation Grid
>
>
>
> Hi,
>
>
>
> I have SG Diagrams using the Cape Datum and I need to transform these to
> the Hartebeesthoek94 datum using the NTv2 datum transformation grid. QGIS
> can take a custom proj definition with the option
> +nadgrids=nameoftheNTv2file.gsb
>
>
>
> Does anyone know where I can obtain the NTv2 grid (the .gsb file)? I don't
> know if there is one file for the whole country or one for each degree
> square.
>
>
>
> Regards
>
>
>
> Craig
>
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