Defines geometry filters with a distance element.
These filters are defined in the filter spec by the DistanceBufferType,
which contains an additioinal field for a distance. The two filters that
use the distance buffer type are Beyond and DWithin.
From the spec: The spatial operators DWithin and Beyond test whether the
value of a geometric property is within or beyond a specified distance of
the specified literal geometric value. Distance values are expressed using
the Distance element.
For now this code does not take into account the units of distance, we will
assume that the filter units are the same as the geometry being filtered.
author: Chris Holmes, TOPP version: $Id: GeometryDistanceFilter.java 22294 2006-10-20 00:55:40Z desruisseaux $org.opengis.filter.spatial.DistanceBufferOperator |