2011

Click Analyze tab ➤ Drawing Object panel ➤ Object Buffer.
A buffer is a zone that is drawn around a topology. Using a buffer, you can
easily identify objects within a specified offset of elements in node, network,
and polygon topologies.
Buffer Distance
Enter distance from the object to the buffer. The buffer will extend the
specified distance from the objects. To create a buffer inside an existing
polygon, enter a negative value for the buffer offset. The buffer offset can
be any of the following:
■ Numeric value. To decrease the size of existing polygons, enter a negative
value.
■ An expression that evaluates to a numeric value. For information on
valid expressions, see Expression Evaluator Functions and Variables.
■ A value in an object data table. Click Expression Builder to select the
table and field.
■ A value in an external database. Click Expression Builder to select the
link template and column.
NOTE If you are creating a buffer around a polygon and want to use a value
in an object data table or an external database, the data must be attached
to the centroid of the polygon.
Expression Builder
Click to select a field in an object data table or an external database from
a list of available data.
Next
Click to display the
Topology Buffer - New Topology dialog box (page 1991).
Finish
Creates the buffer using the current settings after you specify the buffer
distance and enter a valid topology name.
Topology Buffer - Set Buffer Distance dialog box | 1993