UserSpaceOnUse   6535 TclMagick/generic/TclMagick.c 	    UserSpace, UserSpaceOnUse, ObjectBoundingBox
UserSpaceOnUse   1117 magick/draw.c          case UserSpaceOnUse:
UserSpaceOnUse   1806 magick/render.c                 graphic_context[n]->clip_units=UserSpaceOnUse;
UserSpaceOnUse   1105 wand/drawing_wand.c         case UserSpaceOnUse: