Path: utzoo!utgpu!tmsoft!dptcdc!bar
From: bar@dptcdc.datapoint.com (Brian Ruptash)
Newsgroups: can.uucp
Subject: Re: please clean up your uucp map forms
Message-ID: <198@dptcdc.datapoint.com>
Date: 5 Jan 89 06:28:13 GMT
References: <89Jan3.211712est.38118@neat.ai.toronto.edu> <1340@dretor.dciem.dnd.ca>
Reply-To: bar@dptcdc.datapoint.com.UUCP (Brian Ruptash)
Distribution: can
Organization: Datapoint Canada, Toronto, ON
Lines: 27

There's a "better way", as I found out today from a surveyor
wandering about our office tower.

You may have noticed those little brass plates with triangles etched
in them, imbedded around street corners in Toronto.  They are called
control monuments, and are used as reference points for surveyors.
Get the number off of the one closest to your location, and call
up the Metro Central Mapping Agency (392-2516).  Ask for a Metro
benchmark for your location (give them an intersection), and give
them the control monument number.  They'll respond with a set of
north/east coordinates in the Ontario 3 degree zone coordinate
system, which is a pair of distances in metres from some reference
point (from the numbers I got, I'd guess the southern most tip of
Ontario).

They can then run these coordinates through a program to convert
to latitude and longituide.  The result is the latitude/longitude
of the control monument to the nearest 1/100th of a second.

If you then want a more accurate position (like to the centre of
the CPU in your processor), you can use Harald's previously posted
formulae...

--
Brian Ruptash                |  Internet: bar@toronto.datapoint.com
Principal Architect          |  UUCP:     {uunet, utzoo}!dptcdc!bar
Datapoint Corporation        |  Phone:    (416) 222-8005