Produce the block map. LEVELS= specifies the number of response levels for the graph. SHAPE= draws the blocks as 3D cylinders. XVIEW= changes the viewpoint for the map so that the map appears to be slightly rotated. ZVIEW= raises the height of the viewpoint. LEGEND= assigns the LEGEND1 statement to the map legend. 
proc gmap map=maps.us data=reflib.sites;
   id state;
   block sites / levels=8
                 shape=cylinder
                 xview=0.75
                 zview=5
                 legend=legend1;
run;
quit;