[Qgis-user] Calculating/Finding minimum area in a raster

[Ryan Brook (Perth)]

Hi Carolina,

Is it ok to convert your rasters to polygons? You can then work out the area of the polygons and delete/hide the polygons which do not meet your area criteria.
If essential you could then rasterize these polygons at the end.

Raster > Conversion > Polygonize from the QGIS menu or https://gdal.org/programs/gdal_polygonize.html.

>From memory it does not like decimals (or truncates them).

Regards,
Ryan Brook
Senior Civil Engineer
E  ryan.brook at advisian.com<mailto:ryan.brook at advisian.com>
www.advisian.com<http://www.advisian.com/>

From: Carolina Rey <carredy at hotmail.com>
Sent: Sunday, 27 October 2019 22:02
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] Calculating/Finding minimum area in a raster

Hello everyone,

I need to obtain a new raster based on a raster calculating a minimum area of this existing area. By that I mean that in the existing raster I want clip the areas which contain a minimum area in m². Problem is that the existing raster has no value in m². It is a layer with two classes in different Colours represanting LUC (bare soil and low vegetation.

I hope my Question is understandable
Thank you very much
Carolina Rey


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