2.30                      *******************
                                  * RDHEAD WRITE-UP *
                                  *******************
        
        
             This program can be used to print out the header information on 
        any map or mask file used in the noncrystallographic symmetry 
        averaging options. Since all of the programs assume that map and mask 
        files refer to the same structure, cover precisely the same region and 
        use the same grid, it is important to be sure that this is the case. 
        All of the software in fact, verifies this at run time anyway, but it 
        is still useful at times to see exactly what's on the header record, in
        order to find out what went wrong if inconsistancies are reported. The 
        program prompts for the name of the map or mask file, and prints the 
        header information regarding cell constants, map periods and grid 
        range covered by the contents of the file. Note that this program can 
        be used for ANY mask file, including solvent masks created by BNDRY. 
        It can also be used for ANY submap map file arising from the averaging
        related software (MAPVIEW output, EXTRMAP, SKEW, MAPORTH, MAPAVG) but 
        NOT for FSFOUR maps, which always cover a full cell anyway. 

          INPUT (AND OUTPUT) MASKS - As described for SKEW