[mapserver-users] querying to getting bounding box coordinates

David Hildebrand David.Hildebrand at afsc.ca
Wed Nov 24 15:36:02 EST 2010 

It's a bit clumsy but the OGC Filter Encoding protocol forks fine (but I wouldn't want to key it into a browser by hand).  The output is gml which needs to parsed.


===========================
David V. Hildebrand
Agriculture Financial Services Corporation
(403) 782-8239   

www.afsc.ca <http://www.afsc.ca>
This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal and/or privileged information. Please contact Agriculture Financial Services Corporation immediately if you are not the intended recipient of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed. Please consider the environment before printing this email.


-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of David Hildebrand
Sent: Wednesday, November 24, 2010 12:14 PM
To: Rahkonen Jukka
Cc: mapserver-users at lists.osgeo.org
Subject: RE: [mapserver-users] querying to getting bounding box coordinates

Jukka:

I have my MapServer mapfile configured for a WFS service and I can perform GetCapabilities and GetFeature queries.  Is there a URL syntax to specify filter criteria?

Thanks.

===========================
David V. Hildebrand
Agriculture Financial Services Corporation
(403) 782-8239   

www.afsc.ca <http://www.afsc.ca>
This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal and/or privileged information. Please contact Agriculture Financial Services Corporation immediately if you are not the intended recipient of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed. Please consider the environment before printing this email.


-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of David Hildebrand
Sent: Wednesday, November 24, 2010 9:49 AM
To: Rahkonen Jukka
Cc: mapserver-users at lists.osgeo.org
Subject: RE: [mapserver-users] querying to getting bounding box coordinates

Thanks for the tip, Jukka.  I, too, know very little about mapscript and the documentation is sparse in terms of learning it.  I'm curious about WFS queries on a WMS instance.  I believe I have my mapfile set up correctly because the layer in question comes up as ows_type="WFS" when I do a WMS DescribeLayer.  What else do I need?  Will WFS calls work with a WMS instance?

Thanks

===========================
David V. Hildebrand
Agriculture Financial Services Corporation
(403) 782-8239   

www.afsc.ca <http://www.afsc.ca>
This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal and/or privileged information. Please contact Agriculture Financial Services Corporation immediately if you are not the intended recipient of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed. Please consider the environment before printing this email.

-----Original Message-----
From: Rahkonen Jukka [mailto:Jukka.Rahkonen at mmmtike.fi] 
Sent: Tuesday, November 23, 2010 3:12 PM
To: David Hildebrand
Cc: mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] querying to getting bounding box coordinates

Hi,

Yes, they are WFS queries but you can send them to the same Mapserver service if you configure the mapfile properly. If you do not want to use WFS then I suppose you can do whatever you want with mapscript but that is something I do not know anything about. With some imagination it could be possible to do queries and get vectors out from WMS service and search the bounding box on client side (by using attribute filters inside SLD, or variable substitution inside DATA or FILTER, and by having KML as outputformat). Does not feel like a right way to do even it might be fun to experiment with. I suggest to read about mapscript http://mapserver.org/mapscript/index.html

-Jukka-


-----Alkuperäinen viesti-----
Lähettäjä: David Hildebrand [mailto:David.Hildebrand at afsc.ca]
Lähetetty: ti 23.11.2010 23:31
Vastaanottaja: Rahkonen Jukka
Kopio: mapserver-users at lists.osgeo.org
Aihe: RE: [mapserver-users] querying to getting bounding box coordinates
 
Jukka:

The examples you used were WFS queries.  I wasn't aware that WMS queries also supported filters?


===========================
David V. Hildebrand
Agriculture Financial Services Corporation
(403) 782-8239   

www.afsc.ca <http://www.afsc.ca>
This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal and/or privileged information. Please contact Agriculture Financial Services Corporation immediately if you are not the intended recipient of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed. Please consider the environment before printing this email.


-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Rahkonen Jukka
Sent: Tuesday, November 23, 2010 2:12 PM
To: David Hildebrand; mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] querying to getting bounding box coordinates

Hi,

One alternative is to make first a WFS request with attribute filter for finding the feature and let the client to catch the bounding box from the result.
These examples should work, first is Geoserver and another Mapserver. The latter is pointing to a point layer and therefore I queried two features for getting a reasonable bounding box.

http://sigma.openplans.org:8080/geoserver/wfs?service=wfs&version=1.1.0&request=getfeature&typename=states&maxfeatures=1
http://188.64.1.61/cgi-bin/osm-mapserver_i?service=wfs&version=1.1.0&request=getfeature&typename=POI_pub_restaurant&maxfeatures=2

These are just crude examples without the property filter. Queries can be build also so that they do not return attributes. I hope you'll see the idea and think if it could make sense for your use case.

-Jukka Rahkonen-


-----Alkuperäinen viesti-----
Lähettäjä: mapserver-users-bounces at lists.osgeo.org puolesta: David Hildebrand
Lähetetty: ti 23.11.2010 22:48
Vastaanottaja: mapserver-users at lists.osgeo.org
Aihe: [mapserver-users] querying to getting bounding box coordinates
 
I am running a WMS service with Mapserver in a Windows environment.  I
want to be able to run a non-spatial query on a parcel layer to return
the bounding box (in re-projected coordinates) for a particular parcel.
The bounding box and projection will then be used in a WMS query to
return a map image.

I've never coded server-side functionality with Mapserver so any
suggestions would be welcome.

Thanks to all.


===========================
David V. Hildebrand
Agriculture Financial Services Corporation
(403) 782-8239   

www.afsc.ca <http://www.afsc.ca>
This communication is intended for the use of the recipient to which it
is addressed, and may contain confidential, personal and/or privileged
information. Please contact Agriculture Financial Services Corporation
immediately if you are not the intended recipient of this communication,
and do not copy, distribute, or take action relying on it. Any
communication received in error, or subsequent reply, should be deleted
or destroyed. Please consider the environment before printing this
email.


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