The map units used by this map (meters, feet, degrees, and so on). The map's map units can be retrieved by calling the mapUnits() method. An extent, which is the area of the map currently shown within the canvas. The map's extent will change as the user zooms in and out, and...
st_to_meters() - Convert a length to meters. st_geodesic_bearing() - Returns the geodesic azimuth starting from the first coordinate in the direction of the second coordinate. st_geodesic_distance() - Returns the geodesic distance in meters between two coordinates or two geometry points. ...
but in meters when feet would be expected (even when the proper configurations are in feet in general options/project properties). I have no idea if this is a regression since a previous QGIS version. If yes this should be tagged as blocker. It should be checked also if the same happens...
If you wish to have a grid based on ground distance units (such as meters or feet), you should either define the project with a projected coordinate system or include a layer that has a projected coordinate system in the desired units.The grid is saved to a shapefile specified in the Out...