dvdoug / PHPCoord

                $rz = deg2rad(0.631 / 3600);

                break;

            case RefEll::clarke1866(): // assumes NAD27, values from Wikipedia

                $tx = -8;

                $ty = 160;

                $tz = 176;

                $s = 0;

                $rx = deg2rad(0);

                $ry = deg2rad(0);

                $rz = deg2rad(0);

                break;

            case RefEll::international1924(): // assumes ED50, values from http://www.globalmapper.com/helpv9/datum_list.htm

                $tx = -87;

                $rz = deg2rad(0);

                break;

            case RefEll::international1924(): // assumes ED50, values from http://www.globalmapper.com/helpv9/datum_list.htm

                $tx = -87;

                $ty = -98;

                $tz = -121;

                $s = 0;

                $rx = deg2rad(0);

                $ry = deg2rad(0);

                $rz = deg2rad(0);

                break;

            case RefEll::bessel1841(): // assumes Germany, values from Wikipedia

                $tx = 582;