Hi Nicholas:
If you activate the various providers under the Processing toolbox
options, you can have direct access to the various algorithms I
mentioned. I often generate a quick general model, export as a python
script and then refine the script as required.
I am running 3.16.2-Hannover.
Kirk
On 2/25/2021 9:26 PM, Nicolas Cadieux wrote:
Interesting Kirk,
The QGIS vector to raster conversion is not available in the graphical
modeler or do you have another reason behind your solution? I don’t
use much the graphical modeler so I appreciate your incite.
Cheers!
Nicolas Cadieux
https://gitlab.com/njacadieux <https://gitlab.com/njacadieux>
Le 25 févr. 2021 à 15:44, Kirk Schmidt <k...@nortekresources.com> a
écrit :
To add to Nicolas" comment:
1) Create your point layer from a csv (easting, northing id) as a minimum
2) If you want to stay with process modeler, use the SAGA>Raster
creation tools> Rasterize Algorithm to convert the point layer to
your required resolution and size
3) Use the GDAL>Raster Analysis>Proximity or SAGA>Raster tools>
Proximity Raster to create your output.
Kirk Schmidt
On 2/25/2021 4:24 PM, Nicolas Cadieux wrote:
Hi,
You can cut down you use of several plugins by doing the following,
1) Create a vector point file with a single point having the
numerical field containing the value 1. This file could be a csv
containing WKT.
2) Use the vector to raster conversion. (This will take your vector
point file, an create a raster of x,y dimensions. You point will
become 1 and all other values will be 0.
3) Use the Proximity raster distance gdal function.
This requires no plugins so it should be easy to create a graphical
modeler. My favorite way would be to go to strait Python and to
call the gdal proximity function from my Python script. If you had
hundred or thousands of these to do, I could develop a Python script
that could automate the entire thing. Contact me if you have
questions.
Nicolas Cadieux
On 2021-02-25 12:58 p.m., Fabio Falchi wrote:
Dear all,
not having received any answer, I repeat the request.
I need to speed up the process of obtaining rasters with distances
from a single point (or a single lat-lon coordinate) in it.
Manually I use this procedure:
With a georeferenced raster in a UTM projection I use raster
calculator to obtain a raster with all pixels set to zero. Then,
with Serval plug-in, I manually set to 1 the value of the pixel in
the wanted position (either by using a satellite overlay or by
using a point vector layer with the appropriate coordinates). Then
I use the proximity function under Raster>Analisys menu.
I want to make this via the Graphical Modeler, in order to be able
to make the process fast and skip the manual introduction with
Serval plug-in. At the very least, I need a mode to put the value 1
in the pixel of the selected null raster in the position givel by
lat-lon coordinates.
Thank you!
Best,
Fabio Falchi
/USC - Universidade de Santiago de Compostela/
/ISTIL - Light Pollution Science and Technology Institute/
Il sabato 20 febbraio 2021, 18:04:14 CET, Fabio Falchi
<fabio_fal...@yahoo.it> ha scritto:
Dear all,
I need to speed up the process of obtaining rasters with distances
from a single point in it. Manually I use this procedure:
With a georeferenced raster in a UTM projection I use raster
calculator to obtain a raster with all pixels set to zero. Then,
with Serval plug-in, I manually set to 1 the value of the pixel in
the wanted position (either by using a satellite overlay or by
using a point vector layer with the appropriate coordinates). Then
I use the proximity function under Raster>Analisys menu.
I want to make this via the Graphical Modeler, in order to be able
to make the process fast and skip the manual introduction with
Serval plug-in. At the very least, I need a mode to put the value 1
in the pixel of the selected null raster in the position givel by
lat-lon coordinates.
Thank you!
Best,
Fabio Falchi
/USC - Universidade de Santiago de Compostela/
/ISTIL - Light Pollution Science and Technology Institute/
_______________________________________________
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info:https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe:https://lists.osgeo.org/mailman/listinfo/qgis-user
--
Nicolas Cadieux
https://gitlab.com/njacadieux
_______________________________________________
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info:https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe:https://lists.osgeo.org/mailman/listinfo/qgis-user
--
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
RR # 1
Thorburn, NS
B0K 1W0
Tel (902) 922.3607
Email:k...@nortekresources.com
Web:www.nortekresources.com
_______________________________________________
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
--
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
RR # 1
Thorburn, NS
B0K 1W0
Tel (902) 922.3607
Email: k...@nortekresources.com
Web: www.nortekresources.com
_______________________________________________
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
