There are big differences:
1) CoordinateSequenceFilter has access to the entire sequence, while
CoordinateFilter only sees a single Coordinate at a time. This means that
it has no ability to determine the context around the coordinate, which
prevents using it to implement operations which require using adjacent
coordinates (or even the entire sequence).
2) CoordinateSequenceFilter can determine whether a coordinate lies at the
start or end of the sequence, which allows for special handling for cases
that need it.
3) CoordinateSequenceFilter allows access to coordinate values without the
need of copying them out into a new Coordinate object. This is not possible
with CoordinateFilter, which means it is not an efficient framework for
some kinds of algorithms.
In general use CoordinateSequenceFilter instead of CoordinateFilter, unless
the use case is simple and does not need to be optimized.
On Wed, Aug 7, 2013 at 8:25 AM, Landon Blake
<[email protected]>wrote:
> Is there a major functional difference between CoordinateFilter and
> CoordinateSequenceFilter? It seems everything you could accomplish with
> CoordinateSequenceFilter could be done with CoordinateFilter.
>
> Is the main distinction the fact that using CoordinateSequenceFilter would
> indicate when you moved from visiting one ring in a Polygon to the next
> ring? It seems like you wouldn't get this distinction in an implementation
> of CoordinateFilter.
>
> I'm just trying to understand the key differences in these interfaces, and
> when you might choose one over the other.
>
> Thanks.
>
> Landon
>
>
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