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Re: 6-1-75-6 W5M --> LOCAL GRID
- Subject: Re: 6-1-75-6 W5M --> LOCAL GRID
- From: Ben Tupper <btupper(at)bigelow.org>
- Date: Tue, 27 Mar 2001 08:43:37 -0500
- Newsgroups: comp.lang.idl-pvwave
- Organization: Bigelow Laboratory for Ocean Sciences
- References: <email@example.com>
- Xref: news.doit.wisc.edu comp.lang.idl-pvwave:24168
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.
Mark Chan wrote:
> 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
Bigelow Laboratory for Ocean Sciences
180 McKown Point Rd.
W. Boothbay Harbor, ME 04575