Issues with DONLON ATZ and DesignatedPoint "EADH ARP"

[BenoitMaisonny]

1. DONLON ATZ's geometry is a circle centred on a point reference:

<gml:CircleByCenterPoint numArc="1">
  <gml:pointProperty xlink:href="#p9898" xlink:title="DPN_EADH"/>
  <gml:radius uom="KM">10.0</gml:radius>
</gml:CircleByCenterPoint>

Such reference is suitable for one-time display in GML software, but is not suitable for an ICAO AIP data set (in my opinion, at least, but it seems to be supported by the coding guidelines). I would suggest to use a local reference to the DesignatedPoint feature rather than to the aixm:Point in that feature.

2. A DesignatedPoint of type OTHER:ARP is of course not standard. Why not refer to the AirportHeliport directly?