Re: [Qgis-user] Export gpx?

[Patrick Dunford via Qgis-user]

There is also a limitation to the number of fields that can be stored. I 
think it is just limited to name?


On 25/07/22 08:17, Ramon Andinach via Qgis-user wrote:

Hi David,

The GPX format is only able to have points and lines. You’ll need to 
convert the polygon into a line first, and there is something in the 
vector menu that will do this.

(Points map to waypoints, lines map to tracks.)

Regards,
Ramon.

On 25 Jul 2022, at 03:52, David Witton via Qgis-user 
 wrote:


I'm trying to transfer the boundary of a property that is displayed 
in a vector layer in QGIS 3.16.15  into a mapping software. My first 
thought is to select the row in the attribute table, then export it 
as a .gpx file.


However I'm getting an error "Geometry type of 'Multi Polygon' not 
supported in GPX.


Is what I'm trying to do possible using another format?

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[Qgis-user] (no subject)

[Marco Gómez via Qgis-user]

Unistakk
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Re: [Qgis-user] Export gpx?

[Ramon Andinach via Qgis-user]

Hi David,

The GPX format is only able to have points and lines. You’ll need to convert 
the polygon into a line first, and there is something in the vector menu that 
will do this.
(Points map to waypoints, lines map to tracks.)

Regards,
Ramon.

> On 25 Jul 2022, at 03:52, David Witton via Qgis-user 
>  wrote:
> 
> I'm trying to transfer the boundary of a property that is displayed in a 
> vector layer in QGIS 3.16.15  into a mapping software. My first thought is to 
> select the row in the attribute table, then export it as a .gpx file. 
> 
> However I'm getting an error "Geometry type of 'Multi Polygon' not supported 
> in GPX.
> 
> Is what I'm trying to do possible using another format?
> 
> -- 
> David Witton
> 307 413 2072
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[Qgis-user] Export gpx?

[David Witton via Qgis-user]

I'm trying to transfer the boundary of a property that is displayed in a
vector layer in QGIS 3.16.15  into a mapping software. My first thought is
to select the row in the attribute table, then export it as a .gpx file.

However I'm getting an error "Geometry type of 'Multi Polygon' not
supported in GPX.

Is what I'm trying to do possible using another format?

-- 
David Witton
307 413 2072
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Re: [Qgis-user] Filtering layer or selected features by attributes does not work for new added features in QGIS 3.22.8

[Tudorache, Marian via Qgis-user]

Hi Andrea,

Thank you for your advice.
How these .idm and and .ind files were created?
These files are created by reading ESRI coverage data used in an application 
under ArcInfo:
vLayer = qgis.core.QgsVectorLayer(coverageSource + "|layername=arc", 
layerSourceName, "ogr")
and I created shapefile like this
qgis.core.QgsVectorFileWriter.writeAsVectorFormat(vLayer, \
  
shapeDestination + "/" + shapeLayerName + ".shp", \
  "utf-8", \
  srs, \
  "ESRI 
Shapefile")

What is interesting not all the shapefiles have these idm and ind files.
QGIS 2.18 did not have this problem.

Anyway, I assume I can have a general script to remove any file with extension 
idm and ind.
Cab these file be recreated without knowing?

Thanks,
Marian

From: Andrea Giudiceandrea 
Sent: July 23, 2022 6:29 AM
To: Tudorache, Marian ; qgis-user@lists.osgeo.org
Subject: [EXT] Re: RE: Re: [Qgis-user] Filtering layer or selected features by 
attributes does not work for new added features in QGIS 3.22.8

Hi Marian, I advise you, for the future, to avoid sending e-mail messages to a 
mailing list user personal e-mail address (unless requested) and instead please 
always prefer to send the message/replay to the mailing list e-mail address.⁠​ 
Moreover,

Hi Marian,
I advise you, for the future, to avoid sending e-mail messages to a mailing 
list user personal e-mail address (unless requested) and instead please always 
prefer to send the message/replay to the mailing list e-mail address. Moreover, 
better to avoid attach big files to an e-mail message (better to specify a link 
to an online resource).

Looking at the provided ESRI Shapefile layer, it seems to me the issue is due 
to the fact that in addition to the typical ESRI Shapefile files (.shp, .shx, 
.dbf, .prj, ...) are also present the non standard .idm and .ind files which 
contain the "attribute indexes as a mapinfo format index" [1].

If you remove such .idm and and .ind files, then the issue will not occur with 
your ESRI Shapefile layer.

What I suppose is that while QGIS, using the GDAL/OGR library, can use such non 
standard .idm and .ind files for attribute indexes, it (or the GDAL/OGR 
library) fails to properly update such attribute indexes files when a new 
feature is added to the layer. You can check this just looking at such files 
modification time in you file system when a new feature is added to the layer: 
such files are not modified.

Best regards.

Andrea Giudiceandrea



[1] 
https://gdal.org/drivers/vector/shapefile.html#spatial-and-attribute-indexing
Il 22/07/2022 21:54, Tudorache, Marian ha scritto:
Hi Andrea,

Thank you for your answer.
I attach the an archive with the shapefile in question.
I also attached a video to see what is going on.



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