[mapserver-users] SOS Configuration

Tue Jan 17 03:32:15 EST 2012

Hi List,

I am new to the list and have been trying to setup MapServer's SOS Server to serve some observation data.  I have created a map file and managed to have GetCapabilities working.  But when trying out the GetObservation, I am confused...  not much helpful documentation around and have found this discussion from the old SOS User forum : http://osgeo-org.1803224.n2.nabble.com/SOS-disconnect-td1992064.html.  However, still confused on how to map a database column to SOS output !?!?

Metadata for the layer in my map file :

 METADATA
 "sos_value_alias"  "value_test"  ## value is the name of the db clumn
 "sos_value_componenturl" "http://test.org#value_test"
 "sos_procedure"   "unknown"
 "sos_offering_id"  "waterstorage"
 "sos_offering_description" "value_test"
 "sos_observedproperty_id" "9"
 "sos_describesensor_url" "http://localhost/TEST123.xml"
 "sos_srs"   "init=epsg:4283"
 "sos_offering_timeextent" "1900/2010"

The database connection is successful and the GetCapabilities return the following sos information :

- <sos:Contents>
- <sos:ObservationOfferingList>
- <sos:ObservationOffering gml:id="waterstorage">
  <gml:description>value_test</gml:description>
- <!-- WARNING: Optional metadata "sos_offering_name" missing for gml:name
  -->
  <gml:srsName>EPSG:4326</gml:srsName>
- <!-- WARNING: Optional metadata "sos_offering_intendedapplication" missing for sos:intendedApplication
  -->
- <sos:time>
- <gml:TimePeriod>
  <gml:beginPosition>1900</gml:beginPosition>
  <gml:endPosition>2010</gml:endPosition>
  </gml:TimePeriod>
  </sos:time>
  <sos:procedure xlink:href="urn:ogc:def:procedure:unknown" />
- <sos:observedProperty>
- <swe:CompositePhenomenon gml:id="9" dimension="7">
  <swe:component xlink:href="urn:ogc:def:property:OGC-SWE:1:feature" />
  <swe:component xlink:href="urn:ogc:def:property:OGC-SWE:1:identifier" />
  <swe:component xlink:href="urn:ogc:def:property:OGC-SWE:1:ftype" />
  <swe:component xlink:href="urn:ogc:def:property:OGC-SWE:1:value_test" />
  <swe:component xlink:href="urn:ogc:def:property:OGC-SWE:1:type" />
  <swe:component xlink:href="urn:ogc:def:property:OGC-SWE:1:description" />
  <swe:component xlink:href="urn:ogc:def:property:OGC-SWE:1:yearofcompletion" />
  </swe:CompositePhenomenon>
  </sos:observedProperty>
  <sos:featureOfInterest xlink:href="urn:ogc:def:feature:OGC-SWE:3:transient" />
  <sos:responseFormat>text/xml; subtype="om/1.0.0"</sos:responseFormat>
  <sos:resultModel>om:Observation</sos:resultModel>
  <sos:resultModel>om:Measurement</sos:resultModel>
  <sos:responseMode>inline</sos:responseMode>
  </sos:ObservationOffering>
  </sos:ObservationOfferingList>
  </sos:Contents>

GetObservation (http://localhost/cgi-bin/mapserv.exe?map=C:/ms4w/apps/sos/sos_test.map&Request=GetObservation&service=SOS&OFFERING=waterstorage&observedproperty=9&version=1.0.0&responseFormat=text/xml; subtype="om/1.0.0") return the following :

  <?xml version="1.0" encoding="ISO-8859-1" ?>
- <om:ObservationCollection xmlns:gml="http://www.opengis.net/gml" xmlns:ows="http://www.opengis.net/ows/1.1" xmlns:swe="http://www.opengis.net/swe/1.0.1" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:sos="http://www.opengis.net/sos/1.0" xmlns:ms="http://mapserver.gis.umn.edu/mapserver" xmlns:om="http://www.opengis.net/om/1.0" gml:id="waterstorage" xsi:schemaLocation="http://www.opengis.net/om/1.0 http://schemas.opengis.net/om/1.0.0/om.xsd http://mapserver.gis.umn.edu/mapserver http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/apps/sos/sos_test.map&service=WFS&version=1.1.0&request=DescribeFeatureType&typename=test_sos_layer">
  <gml:description xmlns:gml="http://www.opengis.net/gml">value_test</gml:description>
  </om:ObservationCollection>

My quesions are :

1) How do I map a db clumn to a sos output ??   Do i have to create "sos_dbColumn_alias" for each column ?
2) What's the purpose of "sos_dbColumn_componenturl" ?  Do I need to create this for each dbColumn ?
3) I have map the  "sos_offering_description" "value_test", why does the getCapabilities and getObservation return "value_test" as a constant rather then retrieving data from the database ?

Appreciave if someone could point out what is the problem of the map file or point me to some useful documentation or tutorial on set up SOS in MapServer.

Thanks & Regards,

Florence Tan
Research Projects Officer | ASRDC
CSIRO Earth Science and Resource Engineering

Phone: +61 8 6436 8802 | Fax: +61 8 6436 8559
florence.tan at csiro.au<mailto:florence.tan at csiro.au> | www.csiro.au
Address: Australian Resources Research Centre, 26 Dick Perry Avenue, Kensington WA 6151

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