>
> The enumeration list of the OUTPUT_TYPE parameter values of the
> native:createconstantrasterlayer processing algorithm (like for other
> algorithms) is specified in the documentation of such algorithm at
>
>
me findings on the reaster writing, but that will make more sense
in a different dedicated thread.
Cheers,
Andrea
>
> Am 2023-05-09 16:23, schrieb andrea antonello via QGIS-User:
> >> What do you mean by "new raster"? What is supposed to be in it and
> >> how should i
s,
Andrea
If you want to base it on an existing raster, best use a raster calculator
> to create a plain copy.
>
> Cheers, Hannes
> Am 09.05.23 um 08:28 schrieb andrea antonello via QGIS-User:
>
> Hello,
> I am trying to find out the best workflow to create a new raster.
>
ic Works
>
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Hello,
I am trying to find out the best workflow to create a new raster.
As an example I take an existing elevation model raster and loop over it to
set values between 1500 and 2000 to novalue and write the result to a new
raster.
This is the only way I found to do so:
# create new raster with
Hi Doug,
Why not call GRASS r.series through the python interface, average the stack
> of rasters there, then select the point value from the result. It's a bit
> brute force, but when I have used r.series directly in GRASS with hundreds
> of large rasters at a time, there was fairly low memory
I apologize for my previous badly readable code snippet.
Here a better version with a dummy example:
# simple raster stats
cols = dtmLayer.width();
rows = dtmLayer.height();
minV = 1000
maxV = 0
count = 0
sum = 0
transformType = QgsRasterDataProvider.TransformType.TransformImageToLayer
for
Hello,
I am trying to understand how to easily loop through the values of a
raster layer using pyqgis.
In the docs I see the sample and identify methods of the dataprovider,
but can't spot anything that uses rows/cols as a way of iteration.
Is the most efficient way to use transformCoordinates to
> See prior messages in this thread:
> https://lists.osgeo.org/pipermail/qgis-user/2023-April/052855.html
>
ah, sorry, I missed that part somehow.
Thanks, cheers,
Andrea
>
> Regards,
>
> Germán
>
>
> El mié, 26 abr 2023 a las 9:11, andrea antonello via QGIS-User (&
Hi, from what I saw in the docs, you should be able to append to layers
with the filewriter option AppendToLayerNoNewFields?
The CreateOrOverwriteLayer overwrites the layer completely.
Cheers,
Andrea
On Wed, Apr 26, 2023 at 2:58 PM Anne B. Nilsen via QGIS-User <
qgis-user@lists.osgeo.org>
.com/WhereGroup/spatial_filter/blob/e77abb9830f5d46073239b8e7376c52a69046223/filters.py#L45
>
> As of now, the plugin supports it for PostGIS, GPKG and Spatialite layers
> . It probably is easy to adapt for other geospatial databases too.
>
> Cheers, Hannes
> Am 12.04.23 um 09:35 sc
Hello,
I was wondering if in pyqgis there is a way to load a layer to show only
features that intersect a certain geometry. I see the setSubsetString for
sql like queries, but no way to do this with geometries.
Similar to this (but only applied to iterations using getFeatures), I was
wondering if
Hello,
I am trying to work in the scripting editor with two modules.
Assume I have a main.py script and a mylibrary.py in the same folder.
In the system settings I made sure to add the said folder to the PYTHONPATH
in prepend mode in order to be able to find the mylibrary upon import.
This is
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