Re: [UMN_MAPSERVER-USERS] Trying to implement a SOS for the first time

Thu, 28 Sep 2006 06:53:13 -0700 

Kralidis,Tom [Burlington] schrieb:


-----Original Message-----
From: UMN MapServer Users List [mailto:[EMAIL PROTECTED] On Behalf Of Hinrich Paulsen 
Sent: Wednesday, September 27, 2006 9:25 AM
To: [email protected]
Subject: [UMN_MAPSERVER-USERS] Trying to implement a SOS for the first time 

Dear List,


posting to this list for the first time and am promptly 
rejected by the system. Hopefully it is not an omen. :-) 
Well, here is my question again.



Dear List,


I am in the process of setting up a Sensor Observation 
Service (SOS) for the first time using a Kubuntu-Linux 
machine and the following Mapserver:



MapServer version 4.10.0-beta3 OUTPUT=GIF OUTPUT=PNG 
OUTPUT=JPEG OUTPUT=WBMP OUTPUT=SVG SUPPORTS=PROJ 
SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT 
SUPPORTS=WFS_SERVER SUPPORTS=SOS_SERVER INPUT=EPPL7 
INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE 

My data is sitting in a Postgis table which I can easily 
access via WMS.


I have consulted the documentation at:
http://mapserver.gis.umn.edu/docs/howto/sos_server/


and when trying out the examples given there the  
GetCapabilities and  DescribeSensor Requests work fine so far 
but the GetObservation Request does not.



My idea of how the GetObservation Request should work is that 
data in a specific column in my Postgis table is returned 
when I define it in my SOS server mapfile. Here is a snippet 
of the mapfile:


<SNIP>

LAYER
 NAME test_sos_layer
 DUMP TRUE
 METADATA

   "sos_procedure"  "SW01UTL001"                             
                          ## REQUIRED
   "sos_offering_id" "r_wert"                                
                                   ## REQUIRED
   "sos_observedproperty_id" "r_wert"                        
                           ## REQUIRED
   "sos_describesensor_url" 
"http://localhost/temp/SW01UTL001.xml";   ## REQUIRED 
 END

 TYPE POINT
 STATUS ON

 CONNECTIONTYPE postgis
 CONNECTION "user=myuser dbname=mydb host=localhost port=5432"

 DATA "the_geom FROM (SELECT * FROM mytable) AS foo USING 
UNIQUE gid USING SRID=31467"


  PROJECTION
        'init=epsg:31467'
  END

CLASS
   NAME 'r_wert'
      STYLE
       SYMBOL 'circle'
       SIZE 5
       COLOR 255 100 50
       OUTLINECOLOR 0 0 0
     END
END
END

</SNIP>

When I send this there is no error but all I get back is this:

<om:ObservationCollection gml:id="r_wert" 
xsi:schemaLocation="http://www.opengeospatial.net/om 
http://schemas.opengis.net/om.xsd"/>



Where am I going wrong? Any help on pointing me in the right 
direction is highly appreciated!



   



Weird.  What's your GetObservation request URL?

Also, you can test to see if this is even working via WMS or WFS as
sanity check against the data connection, or even a mapserv CGI request.

Let us know what your results are.

..Tom

 


Dear Tom,

thank you for your suggestions. I have moved my stuff from my local machine to 
our testserver so that you can have a look at everything. Please go to 
http://212.79.172.184/sos/

The other links I have provided below so that you can test WMS and WFS too.

WMS:
http://212.79.172.184/cgi-bin/mapserv?map=/var/www/demo.terrestris.de/html/sos/wms_demo.map&VERSION=1.1.1&REQUEST=GetMap&SERVICE=WMS&LAYERS=gauges&STYLES=,&SRS=EPSG:31467&BBOX=3001036,5248260,4193654,6100130&WIDTH=420&HEIGHT=300&FORMAT=image/png&BGCOLOR=0xffffff&TRANSPARENT=TRUE&EXCEPTIONS=application/vnd.ogc.se_inimage

WFS:
http://212.79.172.184/cgi-bin/mapserv?map=/var/www/demo.terrestris.de/html/sos/wfs_demo.map&VERSION=1.0.0&REQUEST=GetFeature&SERVICE=WFS&TYPENAME=pegelpunkte

SOS:
Describe Sensor:
http://212.79.172.184/cgi-bin/mapserv410?map=/var/www/demo.terrestris.de/html/sos/sos_demo.map&Request=DescribeSensor&sensorID=NS01EE0014&service=SOS&version=0.0.31

Get Observation:
http://212.79.172.184/cgi-bin/mapserv410?map=/var/www/demo.terrestris.de/html/sos/sos_demo.map&REQUEST=GetObservation&SERVICE=SOS&offering=r_wert&observedproperty=r_wert&VERSION=0.0.31

Get Capabilities:
http://212.79.172.184/cgi-bin/mapserv410?map=/var/www/demo.terrestris.de/html/sos/sos_demo.map&REQUEST=GetCapabilities&SERVICE=SOS&VERSION=0.0.31

There was an error in my database connection which I found out trying the WFS 
but that did not have any effect on my GetObservation request. Thanks for your 
time.

Best regards,

Hinrich


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