The domain geometry represents the general area that is analysed for potential flood risk of the flood and is typically the first geometry defined by the specialised user. The refinement and alignment geometries must be contained within this geometry, while the other two geometries, boundary and boundary points, must be on the boundary line. A context can only have one domain, which is defined as a single polygon. The domain has only one property: the cell length (CL) represented by a float number and defined by the user.