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Subject: Proposed solution - WGS84 versus CRS issues for the CAP-AU Profile [SEC=UNCLASSIFIED]
UNCLASSIFIED EM-TC & CAP Profiles SC members, I was tasked with the following action item from the CAP Profiles SC meeting on Nov 23rd: ACTION ITEM 1123-05: In addition to including a <parameter> element in the CAP-AU Profile to describe Circle and Polygon using Australia’s GDA94 coordinates, Greg will consider whether to also “Strongly Recommend” or “Require” that the CAPv1.2 <circle> and <polygon> values also be filled in with the equivalent WGS84 coordinates in order to provide interoperability outside Australia. After considering all the dialog received on this topic through the kavi mailing lists and remaining cognisant of the fact that we want to be succinct where possible, I wish to propose the solution I have documented in the attached file, which comprises: 1) Inclusion of a GDA94 reference in the Normative References section of the CAP-AU Profile document (the WGS 84 reference is retained as well further down the list) 2) A statement in the header row of the <area> element explaining the GDA94 issue 3) An example for a circle location in the <area> section that includes GDA94 coordinates in a <parameter> sub-element (as recommended by Darrell O’Donnell) and corresponding WGS84 coordinates using the CAP <circle> sub-element (the coordinates are deliberately the same at present – I am still trying to locate a tool that can convert the WGS 84 coordinates that I extracted from Google Maps (-35.123,150.727) into GDA94) Can interested members please confirm your agreement or disagreement with this proposal. Greg Trott CAP-AU Project Manager Australian Government Attorney-General's Department From: Trott, Gregory UNCLASSIFIED Thought you all might find the attached document handy for discussions scheduled at the Profiles SC call on Nov 23rd – it is a compilation of comments I have received in the last 24 hours addressing the WGS84 / GDA94 question I raised. The yellow highlighted sections in the document point to issues that are of direct interest to Australia regarding the proposed content of the CAP-AU Profile document that is currently being developed in the CAP Profiles SC. I will be participating in the Profiles SC call on Nov 23rd but am not available to join the EM-TC call on Nov 22nd. Cheers Greg Trott CAP-AU Project Manager Australian Government Attorney-General's Department If you have received this transmission in error please notify us immediately by return e-mail and delete all copies. If this e-mail or any attachments have been sent to you in error, that error does not constitute waiver of any confidentiality, privilege or copyright in respect of information in the e-mail or attachments. |
Attachment:
WGS 84 solution for CAP-AU Profile (GT).pdf
Description: WGS 84 solution for CAP-AU Profile (GT).pdf
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