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 > Le 25 févr. 2021 à 15:44, Kirk Schmidt <[email protected]> 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 >>> <[email protected]> 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 >>> [email protected] >>> 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 >> [email protected] >> 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: [email protected] > Web: www.nortekresources.com > _______________________________________________ > Qgis-user mailing list > [email protected] > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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