The GMAP Procedure

Example 5: Producing a Simple Choropleth Map

Procedure features:

ID statement

CHORO statement option:

CDEFAULT=

Sample library member:

GMPCHORO

[Producing a Simple Choropleth Map]

This example produces a choropleth (two-dimensional) map that shows the population of countries in Europe. Since the DISCRETE option is not used, the response variable is assumed to have a continuous range of values. Because neither the LEVELS= nor MIDPOINTS= options are used, the GMAP procedure selects a number of levels based on the number of map areas and then calculates the appropriate response levels. The legend shows the range of values for each level.

goptions reset=all border;

title1 "Population in Europe";
footnote1 j=r "GMPCHORO";

proc gmap map=maps.europe(where=(id ne 405 and id ne 845))
          data=sashelp.demographics(where=(cont=93)) all;
  id id;
  choro pop / cdefault=yellow;
run;
quit;

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