For alle de OrthoimageCoverage-instanser, som en aggregeret OrthoimageCoverage-instans refererer til, skal retningen for kvadratnettets akser og kvadratnetafstanden i hver retning være den samme. ###>All the OrthoimageCoverage instances, to which an aggregated OrthoimageCoverage instance refers, shall share the same orientation of grid axes and the same grid spacing in each direction.