I used the Raster>Analysis>"Proximity (Raster distance)" tool in QGIS in order to create a raster of distances to a particular value in another raster. This is the same sort of thing someone might do for a proximity to mainland analysis... only I'm using it for proximity to something else (a bathymetric slope of more than 10 degrees).
When I run the Proximity tool with my slope raster as the input file, and "Dist unit" as GEO, I receive a warning that "Pixels not square, distances will be inaccurate." I think this makes sense, as I'm using EPSG:4326.
Unfortunately for me, the distances are important, and they are far off reasonable values in my region of interest (though their relative magnitudes make sense, which is useful). If I use PIXEL as the "Dist unit" instead, I do not receive this warning, and the distance values for the generated raster make sense. But how do I generate a raster from this with values that represent geometric distances (in meters)?