Reorders the map polygons by one or more identifier
fields.
| Requirements |
At least one field-identifier is required.
|
| Interaction: |
The CREATE_ID option on the PROC MAPIMPORT
statement has no effect when you also specify the ID option.
|
|
ID 'field-identifier(s)';
|
- 'field-identifier(s)'
-
specifies one or more fields in the shape file that identify
the polygons in the map. The values of the fields that you specify are used
to reorder the map polygons and assign segment numbers in the output map data
set.
When you do not specify the ID statement, the MAPIMPORT procedure uses
the existing polygon order for the output map data set.
You might want to use the ID statement when the default output map data
set does not draw properly in the GMAP procedure. If the ID variable that
you specify in the GMAP procedure is not unique for each polygon, then extraneous
lines might appear in your GMAP output. To ensure that the ID variable is
unique for each polygon, specify the same ID statement in both the MAPIMPORT
and GMAP procedures.
Copyright © 2010 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
