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Subject: RE: [emergency] Re: Circle and Polygon
We agreed early on in CAP to stick to one global coordinate reference system to remove all chance of mis-communication. I think this was/is the right thing to do. NATO and most military coalitions that need to interoperate have settled on this method. There have been many deadly mistakes caused by a misunderstanding of CRSs. If there is a requirement to use different reference systems I suggest they be -in addition to - Or - it be very apparent that a non-standard CRS is being used. Users should not be able to get to the coordinates without knowing what CRS is being used. Dave David M. Danko GIS Standards Environmental Systems Research Institute, Inc. 8620 Westwood Center Drive Vienna, VA 22182-2214 USA E-mail: ddanko@esri.com Tel: 703-506-9515 x 8011 Mobile: 703-989-1863 Fax: 703-506 9514 -----Original Message----- From: Carl Reed [mailto:creed@opengeospatial.org] Sent: Wednesday, June 15, 2005 12:42 PM To: acb@incident.com Cc: emergency@lists.oasis-open.org Subject: Re: [emergency] Re: Circle and Polygon Art - You still appear to be missing the point. We can leave CAP and EDXL with WGS 84 as the default (but not mandatory!) so that all existing implementations work and the level of "simplicity" being sought is maintained. We are suggesting optional elements that would allow folks to use other than WGS 84 as the only CRS. This provides implementation flexibility and allows different regions in the world to implement as they see fit for their region. Cheers Carl > On Jun 15, 2005, at 6/15/05 12:12 AM, Renato Iannella wrote: >> One of other key benefits from reusing GML is their use of spatial >> reference system pointers. >> Without the spatial reference system pointer, we will not be able to >> work >> across jurisdictional boundaries who use different coordinate >> systems, or with many legacy data sources. > > Again, I wonder whether that might just be making life unnecessarily > difficult. As it is we specify a single, global coordinate system, > and folks who use different ones can handle the necessary conversions. > > - 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
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