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| Subject: | RE: GISList: 80% of data having spatial reference? |
| Date: |
12/07/2001 10:34:42 AM |
| From: |
Anthony Quartararo |
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I'd have to agree. Everything is spatial. In addition, it's not static, so
by the time the exhaustive research is done to claim 80%, it probably is
something less or more. The more information is generated, the percentage
is likely to decrease, at an exponential rate. This is both good and bad:
good for geospatial service providers, bad because we'll never catch up to
100% and there is probably an enormous global cost to not having spatial
reference to data. This cost gets higher as more data is created (daily) at
an ever increasing rate. Thus people refer to "spatial" and "non-spatial"
data when in fact, there is no such thing as "non-spatial" data, we just
don't know what it's spatial context is, yet.
Too, in order to claim ALL spatial data as having a reference, that presumes
that ALL data has been inventoried and we all know how foolish it would be
to make such a claim, so the research likely is statistical and
extrapolated, and without seeing the research or the algorithm for the
extrapolation, I would guess it is not current with the growth rate of data,
data storage, etc.
Anthony
-----Original Message-----
From: McGuyer William C Contr 88 ABW/EMO
[mailto:William.McGuyer@wpafb.af.mil\
Sent: Friday, November 30, 2001 8:03 AM
To: gislist@geocomm.com
Subject: RE: GISList: 80% of data having spatial reference?
In all honesty is there any valid method of quantitatively determining the
approximate percentage of ALL data having a spatial reference? In reality
everything has some sort of spatial reference.
Bill McGuyer
GIS Consultant
Intergraph Mapping/GIS Solutions
(937) 257-2201, ext. 239
WPAFB 88 ABW/EM
-----Original Message-----
From: Bill Thoen [mailto:bthoen@gisnet.com\
Sent: Friday, November 30, 2001 1:08 AM
To: gislist@geocomm.com
Subject: Re: GISList: 80% of data having spatial reference?
Steven Ramage wrote:
> I believe it is generally attributed to the "Handling of Geographic
> Information" - Report of the Committee of Enquiry chaired by Lord Chorley
in
> 1987. See also
> http://www.agi.org.uk/public/what-is-agi/objectives/history.htm.
>
Chorley's quote is not in that URL. I'd really like to see that
document as it appears to be a seminal paper in GIS -- especially in
the UK. I did find a ref to it at
http://www.stile.lboro.ac.uk/~gydrw/STILE/t0050020.html, but no
quote. Is there anyone here near the Pilkington Library who could go
look it up for us?
I echoed that quote that Chris seeks (exaggerated to 85%) in GEO
World in Feb 1999 (see last paragraph of
http://www.gw.geoplace.com/gw/1999/0299/299gonln.asp), but I'll be
dipped if I can locate my source now. I'm pretty sure I had seen it
attributed to an Integraph exec back in the late 80's, but in
searching my notes I found this:
"70 to 80 percent of the activities and information your agency is
concerned with are related to location"
Somers, Rebecca. 1987. "Geographic Information Systems in Local
Government: A Commentary." "Photogrammetric Engineering and Remote
Sensing." 53(10): p. 1379.
That puts the quote in 1987 also. Did Chorley read Somers or was it
the other way 'round? Or was it is someone else, now lost in the
mists of Time, who first struck the spark that ignited that quote in
our group consciousness? This question comes up about every three or
four years on the current GIS list, and I've not seen it answered
definitively yet.
Can anyone here peel back the layers of history and legend and find
a documented reference that pins this concept/revelation to an
earlier date?
--
- Bill Thoen
------------------------------------------------------------
GISnet, 1401 Walnut St., Suite C, Boulder, CO 80302
tel: 303-786-9961, fax: 303-443-4856
mailto:bthoen@gisnet.com, http://www.gisnet.com
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