Andreas Pakulat ha scritto:
> Hi,
> 
> I saw today that the distance filters only allow to set a distance 
> value, but there doesn't seem to be a way to set a measure for that 
> value. What measure does geotools use for the value, meters or inch or 
> what? Or am I missing something?

You're not missing anything. Distance filters do completely disregard
unit measures, and work only in pure cartisian space.
Fixing filters to handle different linear unit measures is relatively
easy, making them work against lat/lon geometries is something that
no open source system is able to do (that is, afaik, jts, postgis,
deegree, proj and so on cannot handle this, if you could point me
to any open source library that can solve this problem I would
be quite happy). So, if your problem is the latter, don't hold
your breath, it'll be solved only when someone with good knowledge
of ellipsoidic geometry steps in and adds at least a working point/line
distance algorithm.

Cheers
Andrea

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