The GPROJECT Procedure

Example 3: Clipping an Area from the Map

Procedure features:

PROC GPROJECT options:

	LONGMAX=
	LONGMIN=
	LATMAX=
	LATMIN=

Sample library member:

GPJCLIPP

[Sample library member: GPJCLIPP]

This example uses the clipping capabilities of PROC GPROJECT to create a map of the states in the United States that border the Gulf of Mexico. Because the PROJECT= option is not used in the GPROJECT procedure, the Albers' equal-area projection method is used by default.

goptions reset=all border;

proc gproject data=maps.states
              out=gulf
              longmin=81
              longmax=98
              latmin=25
              latmax=33;
   where density<5;
   id state;
run;

title "Northern Gulf Coast";
footnote j=r "GPJCLIPP ";

pattern value=mempty color=blue;

proc gmap map=gulf data=gulf all;
   id state;
   choro state / nolegend levels=1;
run;
quit;

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