Hello,
I've figured out the problem adding the repositories:
http://qgis.org/ubuntugis-nightly-release and
http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu. Although I
believe that it's not a good practice to install nightly-release and/or
unstable systems in a production environment, I'm sure it is a
temporary situation.
Thanks Jürgen and Andre for the help.
Cheers,
Emilio Bruno
On 07/04/2017 16:00, [email protected] wrote:
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Today's Topics:
1. Re: Custom CRS - adding a rotation (Paul Paris)
2. Problems with QGIS 2.18.5 install (Emilio Bruno)
3. Re: Problems with QGIS 2.18.5 install (Jürgen E. Fischer)
4. Re: Problems with QGIS 2.18.5 install (Andre Joost)
5. Re: Problems with QGIS 2.18.5 install (Jürgen E. Fischer)
----------------------------------------------------------------------
Message: 1
Date: Thu, 6 Apr 2017 15:46:25 -0400
From: Paul Paris <[email protected]>
To: Qgis Users List <[email protected]>
Subject: Re: [Qgis-user] Custom CRS - adding a rotation
Message-ID:
<CAAuOeMczg7B=-60iK1RHaqxNaV2KenJr_45x6j+uUm-Oe+Y=+q...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
GRASS's v.transform:
https://grass.osgeo.org/grass70/manuals/v.transform.html might also be
useful here.
Paul
On Thu, Apr 6, 2017 at 11:10 AM, Andre Joost <[email protected]>
wrote:
Am 05.04.2017 um 20:46 schrieb Brock Riedell:
I have some downloaded geologic map shapefiles that were digitized
incorrectly in UTM space, and they render a few hundred meters away from
their proper locations on georeferenced U.S. topo maps as well as on
Google, Bing, and ESRI online base map data. This is too much for datum
shift; the NAD27 to NAD83 transformation should offset coordinates about
90 m. I have determined that the correction involves a counterclockwise
rotation of ~1.4 degrees and not a simple translation. I have reviewed
the PROJ.4 documentation about using the 7-parameter 'towgs84' options
to add the rotation. I have not been able to get this working by trial
and error; the data plot out 150-200 km away from where they should be.
Questions:
(1) Do I need to input the rotation value as both Rx and Ry?
(2)The documentation says rotations are input as seconds of arc rather
than degrees, correct?
(3) How does the scaling parameter in towgs84 interact with the scale
factor k_0?
The towgs84 parameters are really ment for small rotations only. If you
have big rotations, think of using a custom oblique mercator transformation.
You can find an example at http://gis.stackexchange.com/q
uestions/83861/using-customized-coordinate-system-in-arcgis-desktop
HTH,
André Joost
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Message: 2
Date: Thu, 6 Apr 2017 22:55:40 -0300
From: Emilio Bruno <[email protected]>
To: [email protected]
Subject: [Qgis-user] Problems with QGIS 2.18.5 install
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8; format=flowed
Hello ,
At the present moment I can not install QGIS 2.18.5 on Ubuntu 16.04
due to gdal-abi-2-1-3 missing library from official repositories.
When will this problem be solved ?
The previous versions are not available to install.
Please help !
Thanks,
Emilio Bruno
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