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Re^8: Perl and Solving Trig/Converting GPS to x,y Cords

by BrowserUk (Pope)
on Jan 09, 2013 at 15:25 UTC ( #1012510=note: print w/replies, xml ) Need Help??

in reply to Re^7: Perl and Solving Trig/Converting GPS to x,y Cords
in thread Perl and Solving Trig/Converting GPS to x,y Cords

Given that the area between the +-70° latitudes covers 95% of the Earth's surface and 99.8% of the world's population; and the 0.2% inaccuracy represents a 0.00016 mm on a standard large scale (1::25,000) map -- or, you'd need a map 800 meters wide in order to be able to detect the inaccuracy between the actual and calculated position of a point -- the "general case" is not required for the vast majority of cases.

Hence why I passed along the information that the general case is not usually required, without in any way impugning the accuracy of your post.

I was simply pointing out that unless you run an airline -- and one hopes they know what they are doing -- the simple 2D trig approach to mapping GPS coordinates to map coordinates is usually good enough.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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