r.contour
r.contour.step - Create vector contours from raster at specified steps
Raster (r.*)
ParameterRaster|input|Input raster|False
ParameterString|minlevel|Minimum contour level|0
ParameterString|maxlevel|Maximum contour level|10000
ParameterString|step|Increment between contour levels|100
ParameterString|cut|Minimum number of points for a contour line (0 -> no limit)|0
OutputVector|output|Contours