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

[Kirk Schmidt]

Hallo Fabio:

What version of QGIS are you using?

Kirk Schmidt

On 2/25/2021 1:58 PM, 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_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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-- 
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
RR # 1
Thorburn, NS
B0K 1W0
Tel (902) 922.3607
Email: kirk at nortekresources.com
Web: www.nortekresources.com

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