From: P A Hill & E V Goodall (goodhill_at_xmission.com)
Date: Fri Jul 12 2002 - 18:42:38 CEST
Return-Path: <owner-cavexml-outgoing_at_ethz.ch> Delivered-To: cavexml-archive_at_cartography.ch Received: from localhost (localhost [127.0.0.1]) by karmail.ethz.ch (Postfix on SuSE eMail Server 2.0) with ESMTP id 69B6D14971 for <cavexml-outgoing_at_ethz.ch>; Fri, 12 Jul 2002 18:46:12 +0200 (CEST) Received: by karmail.ethz.ch (Postfix on SuSE eMail Server 2.0, from userid 28) id 42EA58A98; Fri, 12 Jul 2002 18:46:10 +0200 (CEST) Delivered-To: cavexml-loopcheck_at_ethz.ch Received: from localhost (localhost [127.0.0.1]) by karmail.ethz.ch (Postfix on SuSE eMail Server 2.0) with ESMTP id 3447414971 for <cavexml-loopcheck_at_ethz.ch>; Fri, 12 Jul 2002 18:46:09 +0200 (CEST) Received: by karmail.ethz.ch (Postfix on SuSE eMail Server 2.0, from userid 96) id 0CBD08A96; Fri, 12 Jul 2002 18:46:07 +0200 (CEST) Delivered-To: cavexml_at_cartography.ch Received: from localhost (localhost [127.0.0.1]) by karmail.ethz.ch (Postfix on SuSE eMail Server 2.0) with ESMTP id BE7B514971 for <cavexml_at_cartography.ch>; Fri, 12 Jul 2002 18:46:06 +0200 (CEST) Received: from mgr4.xmission.com (mgr4.xmission.com [198.60.22.204]) by karmail.ethz.ch (Postfix on SuSE eMail Server 2.0) with ESMTP id 4C34F7EA9 for <cavexml_at_cartography.ch>; Fri, 12 Jul 2002 18:46:04 +0200 (CEST) Received: from [198.60.22.200] (helo=mail.xmission.com) by mgr4.xmission.com with esmtp (Exim 3.35 #1) id 17T3OD-0004bo-00 for cavexml_at_cartography.ch; Fri, 12 Jul 2002 10:35:29 -0600 Received: from goodhill.dsl.xmission.com ([198.60.114.17] helo=xmission.com) by mail.xmission.com with esmtp (Exim 3.22 #1) id 17T3OD-0000Pi-00 for cavexml_at_cartography.ch; Fri, 12 Jul 2002 10:35:29 -0600 Message-ID: <3D2F06FE.7090606@xmission.com> Date: Fri, 12 Jul 2002 10:42:38 -0600 From: P A Hill & E V Goodall <goodhill_at_xmission.com> User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.4.1) Gecko/20020314 Netscape6/6.2.2 X-Accept-Language: en-us To: cavexml_at_cartography.ch Subject: Re: comments on the data model References: <20020711163033.3CA118A96_at_karmail.ethz.ch> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Loop: cavexml Sender: owner-cavexml_at_karmail.ethz.ch Precedence: bulk Reply-To: cavexml_at_cartography.ch X-Virus-Scanned: by AMaViS perl-11
Richard Knapp wrote:
> <Closure using="LeastSquares" azimuth="92.5"
Two problems with this particular notation.
(1) very verbose
and
(2) doesn't provide complete information
The first problem is that you have choosen to label every point with
a tag. Maybe that is the only choice, but it certainly makes
for a lot of clutter and characters in the file.
The second problem is that the mathematicians in the group
wouldn't trust anyone who just said it was "least squares",
what really goes in such a tag (whether listed once for
many points or once for each point) is just some id of a
paticular implementation. "WinCompass 5.8.2"
There are a lot more people who just want to extract, draw,
throw away or otherwise process all points from a particular
source then people who care about the technicals of how the numbers
came about.
> This would allow multiple closing methods to be applied to a
> cave/system and not overwrite each other. All necessary spherical
> coordinate data would be part of that element (as children or
> attributes).
Seems like a good idea, but keep in mind that if we talk about
what things are needed before talking format we might have a better
chance of collecting up a longer list of what we want in the format
before trying to work out compactness or organization. That is at least
the approach the list is in at this time.
>>>Measurements
>>>already have a cvalue (or at least did for a while) to store the
>>>canonical value of the measurement. Why not have a similar attribute
>>>for corrected values?
Hmm, whose is more correct: my value or yours? At first glance picking
from a list of multiple XYZ seems to be a different problem than
having a dataset that has multiple calculated XYZs. But maybe there
is something to the analogy.
-Paul
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