[Mapserver-dev] OGC ServiceExceptions and invalid layers

[Paul Ramsey]

Download from http://geos.refractions.net/geos-cvs.tar.gz
./configure ; make ; make install

See doc/examples for an example program. Also source/test for some 
other examples. The Doxygen is also online at the geos.refractions.net 
site.

P.

On Thursday, October 23, 2003, at 01:06 PM, Steve Lime wrote:

> I'd been interested in seeing how we could use it. Hell, what's one 
> more
> library.
> The existing operators are admittedly brute force implementations, but
> they
> operate directly on the shapeObj structures and are pretty fast. I
> wouldn't want
> to see a "with GEOS" and "without GEOS" version of the query support,
> either this
> would become a standard library or we shouldn't use it. Depends on how
> much
> it adds.
>
> Steve
>
>>>> Paul Ramsey <pramsey at refractions.net> 10/22/2003 3:48:19 PM >>>
> GEOS (geos.refractions.net) is now in a workable state, and very close
>
> to a release (more a matter of making time to do a release properly
> than
> code issues). All the remaining spatial predicate filters could be
> easily supported by linking into GEOS, but it is another library
> dependency and set of switches (is it there? do this. is it not? do
> that.).
>
> P.
>
> Yewondwossen Assefa wrote:
>
>> Here is the current status for OCG filter encoding support :
>>
>>
>> Spatial Capabilities Filters :
>>
>>    - BBOX : supported
>>
>>    - Equals : (compares if 2 geometries are equal) : Not suooprted
> but
>> could be easliy added to mapserver.
>>
>>    - Disjoint : (opposite to bbox and exclude element that intersects
>
>> the query shape) Not supported. We need to add functions in mapserver
>
>> that returns shapes that only intersects a certain query geometry and
>
>> then we would be able to support it
>>
>>     - Intersects : Not supported (see comments above)
>>
>>      - Touches : Not supported (Touches definition differ depending
> on
>> the geometry it refers to but basically it means the edge of one
>> geometry touches the other geometry without crossing it)
>>
>>
>>      - Within    Not support : Elements are inside the querieng shape
>
>> when It is a polygon, and when It is a line, elements are of linear
>> types and the segnments are a subset of the querying shape.
>>
>>      - Contain : Not supported : opposite to Within
>>
>>      - Overlaps    Not supported : The query shape and the queried
>> elements are of the same geometry. They have a common intersection.
>>
>>      - Beyond    and DWithin : Not supported : The spatial operators
>
>> DWithin and Beyond test whether the value of a geometric property is
>
>> within or beyond a specified distance of the specified geometry.
>> This could be with the current mapserver code woth point query and a
>
>> buffer but needs some works for other type of geometries
>
> -- 
>        __
>       /
>       | Paul Ramsey
>       | Refractions Research
>       | Email: pramsey at refractions.net
>       | Phone: (250) 885-0632
>       \_
>
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>
      Paul Ramsey
      Refractions Research
      Email: pramsey at refractions.net
      Phone: (250) 885-0632