The
GINSIDE procedure compares
a data set of X and Y coordinates to a map dataset containing map polygons.
The procedure determines whether the X and Y coordinates for each point fall
inside of or outside of the map polygons. If the point falls inside of a polygon,
then the ID variable is set to the ID value of that polygon. For example,
if a map contains states, then the ID variable of the output data set is set
to the state that contains the point. The GINSIDE procedure can be used with
the SAS/GRAPH map data sets and the results can be used to annotate onto a
map with the GMAP procedure.
Note: Points that fall on the border of
a polygon might give unpredictable results. ![[cautionend]](../../../../common/63294/HTML/default/images/cautend.gif)
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