Create an annotate dataset from the points data and color the points black if inside the map, and color them red if outside.

data points;
   set mapout;
   length function style color $ 8 position $ 1 text $ 20 ;
   retain xsys ysys "2" hsys "3" when "a" text 
""; retain rotate 360 style "solid" function "pie" position "5"; color=
"black"; size=2; if missing(county) then color="red"; output; run; title "Red dots are outside of Wake County";