Team_J

Puzzle accuracy

13 posts in this topic

I have a puzzle cache that needs a slight tweaking, as one of the permanent clues was changed in the name of progress.  The problem is that I will need a new clue that is three digits long for the decimal portion of the north coordinate.

 

Do any of you puzzle fans know how far each thousandth moves a cache to the north or south?

 

How far is 42 59.857, -77 12.345 from 42 59.856, -77 12.345?

 

dadJ of Team_J

 

(Edit: added bogus west coordinates)

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Thank Thot.  You might remember when someone relocated my multi-ton virtual cache.  Now a state highway department has gone and explosively demolished one of my clues.

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If you do the math, it works out to 6.0700 ft per thousandth minute of latitude -- so, yeah, I'd go with 6.1.  Of course that doesn't work with longitude.

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For longitude, use 6.1'  times the cos() of the latitude.  For Houston, figuring 29.75 degrees north, the cos() is about 0.868. The distance is 6.1' * 0.868 or 5.3'

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It also turns out that an arc minute (one nautical mile at the equator) is almost one statue mile (going east/west) in Houston,  Making a thousandth of a minute in Houston ~ 5.3 feet.

Edited by Great Birds

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Thanks for the help.  And the math.  I will use six feet when I seek a new clue for the cache.

 

Here is a link to the old clue going buh-bye:

 

 

Here is the cache in question:

 

http://www.geocaching.com/seek/cache_details.aspx?wp=gc1c0hm

 

You know the drill - feel free to visit the cache page, but please don't post solutions.

 

dadJ of Team_J

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