The GMAP Procedure

Example 9: Producing a Simple Surface Map

Procedure features:

SURFACE statement

Sample library member:

GMPSURFA

[Producing a Simple Surface Map]

This example produces a surface map that shows the annual population growth rate of countries in Europe. Because the CONSTANT= and NLINES= options are not used, the GMAP procedure draws a surface that consists of 50 lines and uses the default decay function to calculate spike height and base width. And because the ROTATE= and TILT= options are not used, the map is rotated 70 degrees around the Z axis and tilted 70 degrees with respect to the X axis.

goptions reset=all border;

title1 "Population Annual Growth Rate Percentage";
title2 "Europe (1995-2005)";
footnote1 j=r "GMPSURFA";

proc gmap map=maps.europe data=sashelp.demographics;
   id id;
   surface popagr;
run;
quit;

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