Axis Direction standard values Axis positive direction is north. In a geographic or projected CRS, north is defined through the geodetic datum. In an engineering CRS, north may be defined with respect to an engineering object rather than a geographical direction. north Axis positive direction is approximately north-north-east. northNorthEast Axis positive direction is approximately north-east. northEast Axis positive direction is approximately east-north-east. Axis positive direction is pi/2 radians clockwise from north. east Axis positive direction is approximately east-south-east. eastSouthEast Axis positive direction is approximately south-east. southEast Axis positive direction is approximately south-south-east. southSouthEast Axis positive direction is pi radians clockwise from north. south Axis positive direction is approximately south-south-west. southSouthWest Axis positive direction is approximately south-west. southWest Axis positive direction is approximately west-south-west. westSouthWest Axis positive direction is 3pi/2 radians clockwise from north. west Axis positive direction is approximately west-north-west. westNorthWest Axis positive direction is approximately north-west. northWest Axis positive direction is approximately north-north-west. northNorthWest Axis positive direction is up relative to gravity. up Axis positive direction is down relative to gravity. down Axis positive direction is in the equatorial plane from the centre of the modelled earth towards the intersection of the equator with the prime meridian. geocentricX Axis positive direction is in the equatorial plane from the centre of the modelled earth towards the intersection of the equator and the meridian pi/2 radians eastwards from the prime meridian. geocentricY Axis positive direction is from the centre of the modelled earth parallel to its rotation axis and towards its north pole. geocentricZ Axis positive direction is towards the future. future Axis positive direction is towards the past. past Axis positive direction is towards higher column numbers. columnPositive Axis positive direction is towards lower pixel column numbers. columnNegative Axis positive direction is towards higher row numbers. rowPositive Axis positive direction is towards lower pixel row numbers. Axis positive direction is right in display. displayRight Axis positive direction is left in display. displayLeft Axis positive direction is towards top of approximately vertical display surface. displayUp Axis positive direction is towards bottom of approximately vertical display surface. displayDown