MAP_CONVOLVE Resolution

          Most MAP_CONVOLVE methods do not result in a well-defined angular res-
    olution. The only exception if for the GAUSS method applied to data with  an
    existing beam, and with a minor axis argument that is larger than the exist-
    ing  beamsize..  In  this  case  GAUSS will smooth the data to the specified
    (isotropic) angular resolution.