Re: [emergency] GML SF discussion

["Carl Reed" <creed@opengeospatial.org>]

And if anyone needs schema examples, me know. I sent Lew a draft of the SF Corrigendum with teh CirclebyCenterPoint added. We are awaiting the final schematron implementation as well as any final editor comments. The primary editor believes that all is good to go as soon as the schematron files are completed.

 

If anyone is interested,

 

                              <gml:CircleByCenterPoint numArc="1">

                                 <gml:pos>51.389 30.099</gml:pos>

                                 <gml:radius uom="m">20000</gml:radius>

                              </gml:CircleByCenterPoint>

is a GML snippet example for circle geometry.

 

Now for a complex polygon feature that has a circular geometry, the following is an example:

 

<rz:abstract>Radiation hot spots in the vicinity of the AnyTown nuclear reactor. Only readings that exceed the background radiation of 100 millirems per hour.</rz:abstract>

   <rz:rems uom="REM">170[CP1] </rz:rems>

   <rz:where>

      <gml:Surface

         gml:id="RZ001_1"

         srsName="http://www.opengis.net/def/crs/EPSG/0/4326">

         <gml:patches>

            <gml:PolygonPatch>

               <gml:exterior>

                  <gml:Ring>

                     <gml:curveMember>

                        <gml:Curve gml:id="C01">

                           <gml:segments>

                              <gml:CircleByCenterPoint numArc="1">

                                 <gml:pos>51.389 30.099</gml:pos>

                                 <gml:radius uom="m">20000</gml:radius>

                              </gml:CircleByCenterPoint>

                           </gml:segments>

                        </gml:Curve>

                     </gml:curveMember>

                  </gml:Ring>

               </gml:exterior>

            </gml:PolygonPatch>

         </gml:patches>

      </gml:Surface>

   </rz:where>

</rz:RadZones>

 

A bit more verbose :-) but provides an excellent example of how a circular geometry can be a polygon feature that is part of a surface covering "surface". One can have feature instances that are much simpler than the one above. The example above is from a real application of GML in the CBRN community (based on the CCSI model - Common CBRN Sensor Interface)

 

Cheers

 

Carl

 

 

---

 [CP1]170 rem? Or should this be 0.170?

----- Original Message -----

From: "Elysa Jones" <ejones@warningsystems.com>

To: <emergency@lists.oasis-open.org>

Sent: Tuesday, February 01, 2011 3:46 PM

Subject: [emergency] GML SF discussion

> Friends,
> 
> Today on the EM-TC call we 
discussed the status of GML Simple 
> Features.  There was a question 
as to whether geometries could be be 
> represented with the 
profile.  Please refer to Carl's post on Nov 8 
> for the full 
discussion.  In part, he states that the Simple Features 
> profile 
supports numerous geometries as well as the full feature 
> model.  
It is my understanding that is what is needed for 
> geopolitical 
boundary.  That post also contains the requirements that 
> the 
GIS-SC derived for the EDXL use cases.
> 
> Regards,
> 
Elysa
> 
> 
> 
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