RealType.Time, and an exception

Hello,

  This was a long e-mail...then a 2nd look made me boil it down.  Be
thankful :)

1. What Unit is RealType.Time?

2. Related to #1...I'm getting the exception below.  I get the gist of
it but can someone explain the "why" behind it?

visad.BadMappingException: Display.addMap: two ScalarMaps with the same
RealType & DisplayRealType

Thanks!

p

------------------------
Paul Gifford, Capt, USAF
NOAA/NGDC
325 S Broadway EGC2
Boulder CO 80303

303-497-6556 voice
303-497-6513 fax