[geos-devel] GEOS and Mapserver

[Vladimir Guzmán]

I've got a question about this:
It could be possible with this library, to make a join in mapserver?
What I need is to relate spatial information stored in shapefiles, or in
postgis tables, with information stored in Oracle.
(I don't want to use Oracle Spatial).

Is this possible?

Thanks a lot,

--
Vladimir Ilich Guzmán R.
------------------------
http://maintask.com

Paul Spencer wrote:

> Liz,
>
> there is a php_ogr library that we built, it is just a set of php
> wrappers for ogr functionality.  Frank added GEOS support to OGR
> recently.  It should be possible to extend the php_ogr wrappers to wrap
> the ogr functions that talk to GEOS.  You could then use OGR to open any
> suitable format, perform GEOS operations like buffer, union, etc and
> then write the results out to a supported format.
>
> It would also be an interesting exercise to add GEOS support into
> php_mapscript if OGR is built with GEOS support.  It should be possible
> to use mapscript shapeObjs with OGR/GEOS and perform suitable operations
> that way.
>
> The php_ogr stuff is available on www.maptools.org/dl/php_ogr.
>
> Cheers,
>
> Paul
>
> Godwin, Elizabeth wrote:
>
>> I've cross-posted this to various lists, so I'm sorry to those who are
>> getting duplicates.
>>
>> I'd like to beef up my Mapserver applications with some geoprocessing
>> functionality - buffers at present, other functions will follow.  For
>> now I am playing with PostGIS and having great sucess, IF my features
>> are all stored in the database.
>>
>> What I'd like to be able to do though, is take a feature from WMS
>> getFeatureInfo or WFS and be able to buffer that.  As a test of this, I
>> took the GML from a getFeatureInfo request and parsed it manually to be
>> a WKT string.  Then used PostGIS to run the buffer.  Apart from slight
>> precision differences, it appeared to be close to what PostGIS would
>> have done with it's own feature (the WMS request was done against the
>> same feature through MapServer).
>>
>> Now that I confirmed this is all possible, what I am missing is that I'd
>> like to be able to
>> a.. do the conversion from GML to WKT with some script/library
>> b.. do this with a GML stream
>> c.. ultimately do this without PostGIS database dependancy.
>>
>> I figure that GEOS can do the geometry format conversions, is this
>> right?
>> Has anyone written a library for linux/windows that will let me talk to
>> it with PHP?
>>
>> I'm prodding these lists in hopes of finding out what else is going on
>> out there in this area. It would be fabulous if this was all built into
>> Mapserver, but from what I can tell, it's just a thought right now.
>>
>> Thanks!!
>>
>> Liz Godwin
>>
>>
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>>
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>
>
> --
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> |Paul Spencer                           pspencer at dmsolutions.ca   |
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> |Applications & Software Development                              |
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