Re: 6-1-75-6 W5M --> LOCAL GRID

[Ben Tupper <btupper(at)bigelow.org>]

Hi Mark, 

I wrote the LL to UTM transformation code (and the reverse) using the
methods outlined in the following reference:

; REFERENCE: 
;	J.P. Snyder, "Map projections - A working manual',1987, 
;		U.S.G.S. Professional Paper 1395, Supt. of Docs No: I 19.16:1395, 
;		U.S. Govt Printing Office,Washington, DC 20402. 

I don't have that code handy here, but will send it to you.

Ben

Mark Chan wrote:
> 
> Ben,
> 
> Could you point me to the site where I may find out more about the
> conversion porgram that you mention?
> 
> As per Martin Trobec's posted reply, there seems to be a program one can
> buy. However, I will like to see if the conversion program you mention will
> do the job or not.
> 
> Thanks,
> MC
> 
> "Ben Tupper" <btupper@bigelow.org> wrote in message
> 3AC09909.5241880A@bigelow.org">news:3AC09909.5241880A@bigelow.org...
> > Hi Mark,
> >
> > I have not heard of such a system of conversions,... but, it's not clear
> > to me what the 'land' coordinates of points A, B and C mean.  There is
> > code to convert between Lon/Lat in decimal degrees to UTM coords in
> > meters.  From the UTM coordinate system you can then get relative
> > range/azimuth values between the points.  You might even be able to
> > translate the UTM coords to the Canadian equivalent of the US State
> > Plane coordinate systems.
> >
> > Perhaps you could provide more details about these coordinate systems.
> >
> > Ben
> >
> > Mark Chan wrote:
> > >
> > > GIVEN:
> > > Point A @ 6-1-75-6 W5M (Take this to be the origin. Some where in
> Canada).
> > > Point B @ 1-1-75-6 W5M
> > > Point C @ 16-1-75-6 W5M
> > >
> > > QUESTIONS TO BE ANSWERED:
> > > What is the distance between A and B?
> > > Ans: B is 5 miles east of A.
> > >
> > > What is the distance between A and C?
> > > Ans: sqrt(5^2+5^2). C is NE of A.
> > >
> > > Etc. calculation like these.
> > >
> > > QUESTION FOR IDL EXPERTS:
> > > Is there a public domain IDL routine to do the conversion between the
> land
> > > system above to local coordinate?
> > >
> > > Thanks in advance,
> > > Mark Chan
> >
> > --
> > Ben Tupper
> > Bigelow Laboratory for Ocean Sciences
> > 180 McKown Point Rd.
> > W. Boothbay Harbor, ME 04575
> > btupper@bigelow.org

-- 
Ben Tupper
Bigelow Laboratory for Ocean Sciences
180 McKown Point Rd.
W. Boothbay Harbor, ME 04575
btupper@bigelow.org