ZoomZoom - ZoomMap scale factor

Description:
This attribute holds the ZoomMapZoomMap scale factor, by which coordinate values are multiplied (by the forward transformation) or divided (by the inverse transformation). This factor is set when a ZoomMap is created, but may later be modified. The default value is unity.

Note that if a ZoomMap is inverted (e.g. by using astInvertastInvert), then the reciprocal of this zoom factor will, in effect, be used.

Type:
Double precision.
Class Applicability:
ZoomMap
All ZoomMaps have this attribute.
Notes:
  • The Zoom attribute may not be set to zero.