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| Subject: | RE: GISList: 80% of data having spatial reference? |
| Date: |
12/07/2001 10:34:42 AM |
| From: |
McGuyer William C Contr 88 ABW/EMO |
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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
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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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