e PFM format.
     Default is 1.0.

<DT><B>-endian=</b>{<b>big</b>|<b>little</b>}

<DD>
     <P>This specifies the endianness of the PFM image.  The samples
     in the raster of a PFM image are 4 byte IEEE floating point
     numbers.  A parameter of the IEEE format, and therefore the PFM
     format, is endianness, i.e. whether the specified bytes are
     ordered from low addresses to high addresses or vice versa.

     <p><b>big</b> means big endian -- the natural ordering;
     <b>little</b> means litt