Example 8: Specifying Midpoints in a Prism Map

goptions reset=all border;

title1 "Adult Literacy Rate";

proc gmap data=sashelp.demographics(where=(cont=94))
          map=maps.africa density=low all;
   id id;
   format adultliteracypct percentn7.2;
   prism adultliteracypct / midpoints=10 to 90 by 20
                            cdefault=yellow;
run;
quit;