+void AliPosition::SetUnitScale(Float_t s)
+{
+// Set the unit scale for the position coordinates.
+// The scale is normalised w.r.t. the meter, so setting the unit scale
+// to 0.01 means that all position coordinates are in cm.
+// By default the unit scale is set to cm in the AliPosition constructor.
+// It is recommended to use one single unit scale throughout a complete
+// analysis and/or simulation project.
+//
+// Note : This memberfunction does not modify the numerical values of
+// the position coordinates.
+// It only specifies their numerical meaning.
+//
+ if (s>0.)
+ {
+ fScale=s;
+ }
+ else
+ {
+ cout << " *AliPosition::SetUnitScale* Invalid argument s = " << s << endl;
+ }
+}
+///////////////////////////////////////////////////////////////////////////
+Float_t AliPosition::GetUnitScale() const
+{
+// Provide the unit scale for the position coordinates.
+// The scale is normalised w.r.t. the meter, so a unit scale of 0.01
+// means that all position coordinates are in cm.
+ return fScale;
+}
+///////////////////////////////////////////////////////////////////////////