The GMAP procedure produces two-dimensional (choropleth)
or three-dimensional (block, prism, and surface) maps that show variations
of a variable value with respect to an area.
Map data sets and response data sets are used in the GMAP procedure.
A wide assortment of map data sets is available with
software. Starting with the second
maintenance release of SAS 9.3, map data sets based on the digital,
vector-based maps from GfK GeoMarketing GmBH are available. These
are in addition to the updated traditional map data sets provided
Use the GMAP procedure
to perform the following tasks:
summarize data that vary by physical
show trends and variations of data
between geographic areas
highlight regional differences