[gdal-dev] ogr2ogr v1.10.1 and AIXM (issues with curves?)

[Even Rouault]

Le vendredi 16 mai 2014 20:18:22, Jesse McGraw a écrit :
> GDAL gurus,
>  I'm trying to use the AIXM files from the FAA (downloadable here:
> https://nfdc.faa.gov/webContent/56DaySub/2014-05-29/aixm5.0.zip ) in QGIS
> and I'm noticing that there are some that with no warnings or complaints
> just don't produce a polygon. (ogrinfo says "POLYGON EMPTY")
> 
> Two examples are "P-56B DISTRICT OF COLUMBIA.xml" and "POINSETT MOA,
> SC.xml"
> 
> Is there some command line incantation that I'm missing? Or perhaps this
> is a feature of GML/AIXM that isn't supported?  I've read that there is
> little or no GDAL support for curves/arcs though I'm unclear as to the
> current status of that support.

CircleByCenterPoint is not currently supported by the GML decoder.
 
> 
> Here's a snippet from the P-56B file:
> <horizontalProjection>
>  <Surface gml:id="Surface1" srsDimension="2"
> srsName="URN:OGC:DEF:CRS:OGC:1.3:CRS84">
>   <patches>
>    <PolygonPatch>
>     <exterior>
>      <Ring>
>       <curveMember>
>        <Curve ns:id="Curve1">
>         <segments>
>          <CircleByCenterPoint numArc="1">
>           <pointProperty>
>            <Point ns:id="Point_1">
>             <pos>-77.066944 38.921389</pos>
>             </Point>
>            </pointProperty>
>           <radius uom="NM">0.4</radius>
>          </CircleByCenterPoint>
>         </segments>
>        </Curve>
>       </curveMember>
>      </Ring>
>     </exterior>
>    </PolygonPatch>
>   </patches>
>  </Surface>
> </horizontalProjection>
> 
> If I should be posting this somewhere else or filing a bug report/feature
> request please let me know

That could be worth one.

> 
> Thanks!
> -Jesse McGraw

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