From: Garry Petrie (gp_at_europa.com)
Date: Sun Feb 11 2001 - 05:40:03 CET
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Paul & Eleanor wrote:
>
>> Are the names part of the survey data or how we look at the survey data?
>
> Did you not read my posting? I was talking about rooms and pits and
> sections, and ... It is all part of the survey data! Rooms names,
> passage names, area names, are things known by the folks who work
> the cave. How you separate out, some subset of data to form a data
> view is the choice of someone _consuming_ the data, hopefully the
> user of the data can use these groupings to form such 'views'.
I do not think Paul really understands the problem. Consider the case of Carlsbad Cavern,
which has been surveyed several times over, by different people, with different methods.
While Paul might like to group all of the data collected in the "Big Room," another
perfectly useful data set would be the paved trail from the entrance to the lunch room and
around the Big Room. Another data set would be the theotolite (sic) survey from the
entrance to the elevator in the Big Room, which generally does not share stations with the
paved trail. Even within the Big Room with tape and compass surveys, their dates might be
twenty years apart and you need to account for the magnetic declination for each shots.
> My suggestion of grouping is a choice made by someone _producing_
> the data to represent part of the data as collected by the cavers,
> not as decided is important or not imporant by the sofftware or
> software user. I am trying to preserve a piece of data from
> the problem domain, not invent something for any particular
> method of processing.
Excuse me, is not the software user in fact the caver we are talking about? We're all for
preserving the data, in as original form as possible. What we absolutely do not want to do
is introduce a particular data struction into CaveXML that implies a method of processing
at the expense of some other method or unforeseen requirement.
Garry Petrie
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