[Qgis-user] QGIS Themes
Grant Boxer
boxerg at iinet.net.au
Wed Oct 25 18:38:18 PDT 2023
Good morning,
I am trying to create themes in the QGIS map window but it will only allow
me to create one theme. I wish to have one theme for my drill hole collars
(plan view) and another theme for my cross sections (Cross_Section). After I
have created the first theme, the add new theme option is greyed out.
Anyone else have this problem or has a solution?
Cheers Grant
Perth WA
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Today's Topics:
1. Re: Convert PNG file to vector file (Johannes Kr?ger (WhereGroup))
2. Re: Convert PNG file to vector file (krishna Ayyala)
3. Re: Convert PNG file to vector file (David Strip)
4. How to download QGIS for MacOs Ventura 13.5.2 (Ittig Isabel)
5. Using transformations in SVG Parameters (Jacob Huffman)
----------------------------------------------------------------------
Message: 1
Date: Wed, 25 Oct 2023 14:00:26 +0200
From: Johannes Kr?ger (WhereGroup) <johannes.kroeger at wheregroup.com>
To: krishna Ayyala <ayyalakrishna at gmail.com>, qgis-user
<qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Convert PNG file to vector file
Message-ID: <edf5b061-881d-40f1-9ee0-59a79abe5d7f at wheregroup.com>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
No, that would be a very hard computer vision problem because of the styles
and overlays. You will be faster and more accurate if you recreate an
approximation of the hexagonal grid and then retrace all polygons manually
using those cells.
Am 25.10.23 um 13:37 schrieb krishna Ayyala via QGIS-User:
> I am reposting this question.Can anyone please help?
>
> Hello,
> I have a png file. This has polygons with 36 categories?as shown in
> the legend. Is it possible to convert?this file to?a vector file such
> as .shp or gpkg file? When I open the attribute table, it should be
> able to distinguish between each of these 36 categories. Below is the
> weblink to png. Can anyone help me with this please?
>
> Regards.
>
> ListofProjects.png (2200?1700) (oklahoma.gov)
> <https://oklahoma.gov/content/dam/ok/en/broadband/documents/grant-prog
> rams/arpa-slfrf-ii/ListofProjects.png>
>
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Message: 2
Date: Wed, 25 Oct 2023 07:46:19 -0600
From: krishna Ayyala <ayyalakrishna at gmail.com>
To: Simon Dietmann <dietmann at pgnu.de>, qgis-user
<qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Convert PNG file to vector file
Message-ID:
<CADUrCAjOP4xSk1YGhjMtRvPFMp4Yu9t2nOdCOxa9DK7NVeVAnA at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Thanks for the reply Simon. The Polygonize tool did not work for me.
Regards.
On Wed, Oct 25, 2023 at 5:49?AM Simon Dietmann <dietmann at pgnu.de> wrote:
> Hi Krishna,
>
>
>
> have you tried the polygonize algorithm? Raster ? Conversion ?
> Polygonize (Raster to Vector)
>
>
> https://docs.qgis.org/3.28/en/docs/training_manual/complete_analysis/r
> aster_to_vector.html
>
> Some post processing may be necessary.
>
>
>
> cheers, Simon
>
>
>
>
>
>
>
> i.A. Simon Dietmann
> Projektleiter | Geograph
>
> PGNU Planungsgesellschaft Natur & Umwelt mbH Amtsgericht Frankfurt am
> Main, HRB 111938;
> Gesch?ftsf?hrer: Dr. Benjamin Hill, Johannes Christoph Kress,
> Alexander von K?chler Hamburger Allee 45 +++ 60486 Frankfurt am Main
> Durchwahl: +49 69 952964-75 +++ Fax: +49 69 952964-99 +++ Mobil:
> E-Mail: dietmann at pgnu.de +++ Web: www.pgnu.de
>
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> *Von:* QGIS-User <qgis-user-bounces at lists.osgeo.org> * Im Auftrag von
> *krishna Ayyala via QGIS-User
> *Gesendet:* Mittwoch, 25. Oktober 2023 13:37
> *An:* qgis-user <qgis-user at lists.osgeo.org>
> *Betreff:* [Qgis-user] Convert PNG file to vector file
>
>
>
> I am reposting this question.Can anyone please help?
>
>
>
> Hello,
>
> I have a png file. This has polygons with 36 categories as shown in
> the legend. Is it possible to convert this file to a vector file such
> as .shp or gpkg file? When I open the attribute table, it should be
> able to distinguish between each of these 36 categories. Below is the
> weblink to png. Can anyone help me with this please?
>
>
>
> Regards.
>
>
>
> ListofProjects.png (2200?1700) (oklahoma.gov)
> <https://atpscan.global.hornetsecurity.com/index.php?atp_str=GYN90zoJe
> aFh811GmAOBZkS2BWvrDu0iRZzKqr1WbSyKhUsdQsbism_XYyxg1BeOfShdSVDEYIyNr6i
> G4hpBVspG11qDIXgFv8txd2pBoxU0XEfyHeakt4e4JDoEI00Er4kX-t8frtjvSMVO2YN4h
> p7vRZL2dKQtPvLWTI74ZLBSuiFowFrmHeY_GIxZ68nLweyq6IG-j8gRDFOe3W78OajBXEl
> g3uJ_dLmHgdA4nYePmvDV7ZRN4RmGmTCu_3y5AZqP0jHFy3lvEuY4Zk1JWm07A5OpjX2gH
> AYKuk3hDwg-6qqK0a13iAOptDHSeySbFK309b6f3NHp04GB7p9ZQ72eBe_FesF6i3IEEl1
> 094nK39rZDNcpY3Qk4PYiXxpoxegkYXwNdLah3C7QdDlfix9lqzv3pQY6z-5qURImx6bPb
> qojOjoj6J0knGN7Qa0eJY3gIzo6I-RhmBmvSVheFRSS9DDlX7Q>
>
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Message: 3
Date: Wed, 25 Oct 2023 09:14:27 -0600
From: David Strip <qgis-user at stripfamily.net>
To: krishna Ayyala <ayyalakrishna at gmail.com>, qgis-user
<qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Convert PNG file to vector file
Message-ID: <e2d74b4c-dd2d-4edd-bf35-2f6ffa8ac308 at stripfamily.net>
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Message: 4
Date: Wed, 25 Oct 2023 18:24:08 +0200
From: Ittig Isabel <trinita1939 at gmail.com>
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] How to download QGIS for MacOs Ventura 13.5.2
Message-ID: <56648DAB-2E71-4BB9-AAD2-D9A98310D863 at gmail.com>
Content-Type: text/plain; charset=utf-8
> Hi,
>
> I am trying to download the program but my computer keeps answering that
the download is impossible, because it doesn?t recognize the last version of
QGIS for Mac. How can I solve this problem?
>
> Thank you for your attention and help.
>
> Isabel
>
>
>
>
------------------------------
Message: 5
Date: Wed, 25 Oct 2023 13:48:05 -0400
From: Jacob Huffman <jflgators6042 at gmail.com>
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] Using transformations in SVG Parameters
Message-ID:
<CAFNfyNp=YTiO_89BpT0wCtFJM0oDLPb5+igmybETH1GoYKApBA at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
I made some custom SVG symbols for a project I?m working on and I?ve had
success using parameters to control fill, stroke, and stroke-width.
However, I have text in the symbols that I would like to rotate to face
straight up no matter what angle the whole symbol is facing.
So far the text object I?ve been working with has a matrix transformation
applied to it.transformation=?matrix(a,b,c,d,e,f)?
I tried applying a second transformation just for the rotation with no luck.
transformation=?matrix(a,b,c,d,e,f)?
transformation=?rotate(param(textangle))?
I then tried adding a rotation to the existing transformation
transformation=?matrix(a,b,c,d,e,f) rotate(param(textangle))?
After this I tried just using the rotate tag, which is supposed to rotate
each character in the text independently
transformation=?matrix(a,b,c,d,e,f)? rotate=?param(textangle)?
I haven?t had a ton of time to play with it beyond that but I?m wondering is
this just a limitation in the way that QGIS renders the SVG?
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