> Hi List;
>
> I am trying to understand which standards used by GeoTools. For filter
> applications it seems that it implements the OGC filter encoding
> specification.
Correct - version 1.1.
> And it takes it from GeoAPI interface with the help of FilterFactory2.
Correct.
> I am confused an explanation on the user guide "In the real
> world we need to go beyond the specification. FilterFactory2 will let you
> work with JTS Geometry instances (the specification is only defined to work
> with ISO Geometry)."
http://docs.codehaus.org/display/GEOTDOC/Filter>
http://docs.codehaus.org/display/GEOTDOC/Filter>
> JTS implements the OGC SFS specification, and the filter encoding
> specification is also from OGC. So there is written" (the specification is
> only defined to work with ISO Geometry)" which specification you mean?
The Filter 1.1 specification was updated to work with GML3 (which
represents ISO Geometry 19107 - so Point, Curve and Surface - and
"Trans Finite Set").
This is much more complicated then the model used by JTS which is
Point, Line and Polygon - and "Geometry".
> OGC filter encoding specification?
yes it is; our implementation goes beyond the specification and will
work with a couple different kinds of geometry. We just want to get
things done.
Jody
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