RE: 1-19-06 GIS SC Meeting notes

The GIS SC (finally) met again on 1-19-06 to discuss the actions to the GIS 
SC from the EDXL discussions earlier in the week. Dave Danko, Patti Aymond, Tom 
Merkle and Carl Reed were in attendance.

 

We discussed CIRCLE. Agreed that KILOMETERS is OK. However, we also 
discussed the possibility that an optional element be added that allows the 
expression of the accuracy of the radius. (Not precision, but accuracy). Many 
sensor systems and most cellular location processes do provide accuracy 
statement. Also, the IETF as part of the internet infrastructure (DHCP) will be 
providing accuracy statements WRT location payloads. We believe further 
discussion on this topic is warranted.

 

We discussed POLYGON. Agreement that we want to keep the expression as 
simple as possible. However, we agreed that more study is required before making 
final recommendations on polygon. That said, we did have a good discussion on 
how to deal with interior rings (correct ISO terminology), also known as holes 
or islands. We believe that there should be an optional element that allows 
expression of interior rings. This could be done by a flag that specifies 
inclusion (element is an island of a polygon). Type could be a Boolean.

 

Respectfully submitted.

 

Carl Reed, PhD
CTO and Executive Director Specification 
Program
OGC

 

The OGC: Helping the World to Communicate Geographically

 

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