(subject changed because this isn't really about the CPDs anymore) > From: Greg Troxel [mailto:g...@ir.bbn.com] > Sent: Monday, November 26, 2012 4:48 AM > To: Paul Norman > Subject: Re: [Talk-us] Alaska CPD boundaries > > > I'm sort of answering my own question, but the latest TIGER data has > it at > this limit. > > When did 3 change to 12 as a claimed territory limit? Do you think > TIGER is perhaps just not paying attention, because there are no > residents from 3 to 12, so they don't care?
My standard reference for this is NOAA's short white paper: http://www.nauticalcharts.noaa.gov/csdl/docs/GIS_Learnaboutmaritimezones1pag er.doc The 3 mile zone was extended by Proclamation in 1988. TIGER changed at some point from the coastline (one of them) to the 3 mile limit (from one of the coastlines). As a practical matter the maintaining an accurate coastline definition is difficult - it ended up extremely messy in some areas with all of the little sandbars and islands as detached parts I can't see that TIGER would ever use 12 for boroughs and CPDs - that's outside the state submerged lands. If the state should use the limit of 3 instead of 12 is a different question. OSM is about the ground truth so I don't know what a sailor would say if asked where they were between the 3 mile and 12 mile limits. My experience with borders is with the Canada-US border in BC. Legally speaking you can enter what Washington State claims before you enter the US. At other points it's the other way around. We just go for a consistent set of borders representing what's on the ground. _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
