RE: Notes from today's teleconference

Any comments before I post to the EM TC GIS archives appreciated

 

Thanks

 

Carl

 

Rob, Gary, Hans, Carl, Rex

 

Discussion on the use of OASIS GML "where" profile and how to be used in 
NIEM. Adaptor would be the proper approach.

 

Discussion on linestring. Flat earth or geodesic. Flat earth as most events 
are over a small area. Question of use cases and a linestring. A number of use 
cases were identified (hurricane eye, tornado path, route, flow of hazardous 
waste in a river). Then a discussion on directionality. Application 
dependent.

 

Units of measure: Should be mandatory. Need to include some guidance along 
with some references. Guidance: Avoid multiple UoMs in the same payload. Should 
we enumerate our own list?

 

Is zero a valid distance/radius? No. Use a point geometry.

 

Polygons - are islands in? Yes. Need to clarify language in document about 
direction of coordinates on the exterior boundary and interior boundary.

 

Need to report this out of the SC and make it an official position of the 
TC and move forward. We need to do this in two weeks time.

 

Carl Reed, PhD
CTO and Executive Director Specification 
Program
OGC

 

The OGC: Helping the World to Communicate Geographically

 

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