Method for determining a robot position (PRa-h, PRx) of an autonomous mobile green area maintenance robot on an area to be maintained, wherein the method has the steps of: a) determining at least one robot position (PRa-h) of the autonomous mobile green area maintenance robot by virtue of the green area maintenance robot receiving at least one global positioning signal (SGa-d) from a global positioning system, b) determining a station position (PSa-h) for at least one local positioning station (36a-h) on the basis of the at least one determined robot position (PRa-h) and by interchanging at least one local positioning signal (SLa-h) between the green area maintenance robot and the at least one positioning station (36a-h), and c) determining a robot position (PRx) of the green area maintenance robot on the area to be maintained on the basis of the at least one determined station position (PSa-h) and by interchanging at least one local positioning signal (SLx-z) between the green area maintenance robot and the at least one positioning station (36a-h), - wherein the green area maintenance robot has a GNSS receiver, and - wherein step a) comprises: determining the robot position (PRa-h) by virtue of the GNSS receiver receiving global positioning signals (SGa-d) from a GNSS (GNSS), - wherein step a) is carried out if the GNSS receiver receives global positioning signals (SGa-d) of a minimum quality from a minimum number of GNSS transmitters (GNSSa-d), in particular four GNSS transmitters, of the GNSS (GNSS) at the same time, and - wherein step c) is carried out if the GNSS receiver does not receive any global positioning signals (SGa-d) of the minimum quality from the minimum number of GNSS transmitters (GNSSa-d), in particular four GNSS transmitters, of the GNSS (GNSS) at the same time. a) determining at least one robot position (PRa-h) of the autonomous mobile green area maintenance robot by virtue of the green area maintenance robot receiving at least one global positioning signal (SGa-d) from a global positioning system, b) determining a station position (PSa-h) for at least one local positioning station (36a-h) on the basis of the at least one determined robot position (PRa-h) and by interchanging at least one local positioning signal (SLa-h) between the green area maintenance robot and the at least one positioning station (36a-h), and c) determining a robot position (PRx) of the green area maintenance robot on the area to be maintained on the basis of the at least one determined station position (PSa-h) and by interchanging at least one local positioning signal (SLx-z) between the green area maintenance robot and the at least one positioning station (36a-h), - wherein the green area maintenance robot has a GNSS receiver, and - wherein step a) comprises: determining the robot position (PRa-h) by virtue of the GNSS receiver receiving global positioning signals (SGa-d) from a GNSS (GNSS), - wherein step a) is carried out if the GNSS receiver receives global positioning signals (SGa-d) of a minimum quality from a minimum number of GNSS transmitters (GNSSa-d), in particular four GNSS transmitters, of the GNSS (GNSS) at the same time, and - wherein step c) is carried out if the GNSS receiver does not receive any global positioning signals (SGa-d) of the minimum quality from the minimum number of GNSS transmitters (GNSSa-d), in particular four GNSS transmitters, of the GNSS (GNSS) at the same time. - wherein the green area maintenance robot has a GNSS receiver, and - wherein step a) comprises: determining the robot position (PRa-h) by virtue of the GNSS receiver receiving global positioning signals (SGa-d) from a GNSS (GNSS), - wherein step a) is carried out if the GNSS receiver receives global positioning signals (SGa-d) of a minimum quality from a minimum number of GNSS transmitters (GNSSa-d), in particular four GNSS transmitters, of the GNSS (GNSS) at the same time, and - wherein step c) is carried out if the GNSS receiver does not receive any global positioning signals (SGa-d) of the minimum quality from the minimum number of GNSS transmitters (GNSSa-d), in particular four GNSS transmitters, of the GNSS (GNSS) at the same time.