Subject:
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Re: twisted map
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Wed, 5 Jun 2002 04:45:01 GMT
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Viewed:
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393 times
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Mr L F Braun wrote:
> It's a transverse projection, probably at 45º of rotation--it looks
> like a Lambert, but without access to my Bugayevsky and Snyder [1] I
> couldn't tell you what the exact variation is called. There are so
> many names for so many slight variations of the mathematics that I
> can't remember them all (and besides, my work usually involves UTM
> and little else). But it was definitely rotated transversally before
> the projection was calculated--that's the only way to get output
> quite like that.
I agree with your assessment that it is a transverse project, but I
thought Lambert was only suitable for projections of a hemisphere? I
could be mistaken though, it's been several years since I worried about
projections and never did much serious work with anything bigger than a
hemisphere and most the time i was worried about the US (1). I since
gotten rid of most of my map projection books. oh well.
Changing topics slightly, what are currently doing with mapping? Is it
part of your graduate work? just curious... I've been doing a lot of
current work with UTM and Stateplane in the past few months.
> For general information on transverse projections, see this:
>
> http://www.mapthematics.com/Essentials/Essentials.html
great site-- really informative both for the newbie and 'enthusist'
-c
1- circumstance of my job, not my personal beliefs.
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Message has 1 Reply:
 | | Re: twisted map
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| (...) For hemispheric mapping, conic projections were generally used. Lambert can be applied cylindrically, though: (URL) Which gives the map severe t/b end compression. I'm not sure, again, what the maths are that govern the original map Suz put (...) (22 years ago, 5-Jun-02, to lugnet.off-topic.geek)
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Message is in Reply To:
| | Re: twisted map
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| (...) It's a transverse projection, probably at 45º of rotation--it looks like a Lambert, but without access to my Bugayevsky and Snyder [1] I couldn't tell you what the exact variation is called. There are so many names for so many slight (...) (22 years ago, 3-Jun-02, to lugnet.off-topic.geek)
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