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Subject: RE: [emergency] RE: Sample email to interestedpartiesWRTgeoenhancements to CAP
Ron, One thought on "World wide events": It is a fairly common occurrence to have alerts that impact multiple countries (i.e. Hurricanes, tidal waves). It would seem that this type of event would require translation for the multiple CRS systems. David M. Yarbrough Systems Engineer Northrop Grumman Information Technology Mail Stop - WBAX 09 +: P.O. Box 149, Pascagoula, MS 39568-0149 (: (228) 935-1415 ( Cell: (228) 327-2534 Org: 10514 e*: David.Yarbrough@ngc.com The information transmitted is intended only for the person (s) or entity to which it is addressed and may contain sensitive and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient (s) is prohibited. If you received this in error, please contact the sender and destroy any copies of this document. -----Original Message----- From: Ron Lake [mailto:rlake@galdosinc.com] Sent: Tuesday, November 27, 2007 10:08 AM To: creed@opengeospatial.org Cc: Art Botterell; emergency@lists.oasis-open.org; sandro@oss.com Subject: RE: [emergency] RE: Sample email to interestedpartiesWRTgeoenhancements to CAP Something like this is true in MOST of the world, the US included. R -----Original Message----- From: creed@opengeospatial.org [mailto:creed@opengeospatial.org] Sent: November 27, 2007 7:37 AM To: Ron Lake Cc: Art Botterell; emergency@lists.oasis-open.org; sandro@oss.com Subject: RE: [emergency] RE: Sample email to interestedpartiesWRTgeoenhancements to CAP As I said in an earlier email, support of the new Chinese datum in gospatial data formats, encodings, or software is a mandate in China. This is a perfect example of what Ron is referring to as a local requirement. The rationale for the Chinese requirement is that th new datum is much more accurate than WGS 84 for the majority of China. Carl > Art: > > Then one says that for such devices there is only one CRS and this is > specified by a particular CRS registry entry. In either case the > specification of the CRS MUST be unambiguous, Just agreeing on say > (lat,lon) will not be enough if the different users select for example > different datums as this will lead to the same (lat,lon) corresponding > to different places on the earth. > > Since at the present time, there are not a great number of truly global > alerts - it could make sense to have the single CRS used in one part of > the world differ from that in another part of the world - I think the > key issue is to eliminate ambiguity in the meaning of coordinates. > > Ron > > -----Original Message----- > From: Art Botterell [mailto:ABott@so.cccounty.us] > Sent: November 26, 2007 5:17 PM > To: Ron Lake; emergency@lists.oasis-open.org; sandro@oss.com > Subject: Re: [emergency] RE: Sample email to > interestedpartiesWRTgeoenhancements to CAP > > Ron, that makes perfect sense for full-blown GIS installation, but what > about cellphones and wristwatches and mass-market alerting devices? > What about systems that receive broadcast, one-way signals? If they > can't access these remote lookup/conversion services, significant errors > could result. > > I'd encourage any of us who weren't around for our earlier CAP > proceedings to at least review the introductory text of the current > spec. I suspect some aspects of the application domain that may not be > obvious, especially for folks who come from an IT background more than a > telecommunications perspective. > > - Art > -----Original Message----- > From: "Ron Lake" <rlake@galdosinc.com> > To: <emergency@lists.oasis-open.org> > To: <sandro@oss.com> > To: Botterell, Art <ABott@so.cccounty.us> > > Sent: 11/26/2007 5:03:20 PM > Subject: RE: [emergency] RE: Sample email to interested > partiesWRTgeoenhancements to CAP > > Hi Art: > > I think this is a good point. Suppose you use GML geometries in CAP > constructs. For example, a GML point is encoded as follows: > > <gml:Point srsName = "urn:x-ogc:def:crs:EPSG:4326"> > <gml:pos>45.7 110.6</gml:pos> > </gml:Point> > > The srsName attribute indicates the CRS in use. This does NOT need to > be resolved in real time, but those wishing to consume or generate this > data may wish to look this up. This can be done using a registry such as > > at http://www.epsg-registry.org and entering the URN string or the EPSG > code. A giving alerting community (the whole world or the US or > whatever) can select the set of CRS definitions that they permit. > > If you do not understand the srsName (there could be a default value > also) then you need to talk to a conversion service or request the data > in an srsName you do understand. > > Cheers > > Ron > > > -----Original Message----- > From: Art Botterell [mailto:ABott@so.cccounty.us] > Sent: November 26, 2007 4:38 PM > To: emergency@lists.oasis-open.org; sandro@oss.com > Subject: Re: [emergency] RE: Sample email to interested > partiesWRTgeoenhancements to CAP > > Let's keep our eye on the ball here. Our goal isn't adoption of CAP for > > its own sake and at any cost. The purpose of CAP is to achieve > interoperability among warning systems globally. > > If we start to sacrifice interoperability in pursuit of nominal > adoptions that can't actually communicate with each other, I'm afraid > we'll be justly criticised for having lost sight of our real mission. > > - Art > > > --------------------------------------------------------------------- > To unsubscribe from this mail list, you must leave the OASIS TC that > generates this mail. You may a link to this group and all your TCs in > OASIS > at: > https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php > > > --------------------------------------------------------------------- > To unsubscribe from this mail list, you must leave the OASIS TC that > generates this mail. You may a link to this group and all your TCs in > OASIS > at: > https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php > > > --------------------------------------------------------------------- To unsubscribe from this mail list, you must leave the OASIS TC that generates this mail. You may a link to this group and all your TCs in OASIS at: https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php
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