[Qgis-user] raster with distance values from a point

[Fabio Falchi]

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_falchi at 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
  
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