
Subject:
[cohp] Digest Number 5196
From:
cohp@yahoogroups.com
Date:
11/14/2015 2:32 AM
To:
cohp@yahoogroups.com

County High Pointing in all 50 states
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County High Pointing in all 50 states Group
7 Messages
Digest #5196
1a
Re: FW: Prime Meridians by "fplobdell" deadbugman
2a
North/south/east/west points by
2b
Re: North/south/east/west points by "David Sanger" davidsangerphotography
2c
Re: North/south/east/west points by "David Sanger" davidsangerphotography
3a
New file uploaded to cohp by
4a
Re: third opinion on easternmost by "David Sanger" davidsangerphotography
5a
Re: Aleutian Islands by davidwmolson2

Messages
1a
Re: FW: Prime Meridians
Fri Nov 13, 2015 4:51 am (PST) . Posted by:
"fplobdell" deadbugman

Don, I also thought this was very interesting.  Thanks for posting it.

Fred L.

----- Original Message -----

 

Thanks Don, this is fascinating!

Scott

On 12 November 2015 at 11:51, Don Holmes climberdh@outlook.com [cohp] < cohp@yahoogroups.com > wrote:

 

 

Some time ago, I did some research on the Prime Meridian used in the United States.  I have attached some information I found.  I hope it is not too boring
 
Don Holmes

-- 

Scott Surgent
Principal Lecturer & Associate Director, First Year Mathematics

Arizona State University, Tempe
 

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2a
North/south/east/west points
Fri Nov 13, 2015 6:09 am (PST) . Posted by:
Ignoring the earth's rotation and current placement of the north and
south points at the axis of rotation, has anyone come up with the
north/south/east/westernmost points in the US as regards to it's
position in apace as it orbits the sun? All maps I've seen of the
earth ignore the tilt and have the poles at the top and bottom. Many
globes have the tilt, but would not work well to find the 4 extremes..
This would require a tilting of the latitudinal/longitudinal lines over
the surface.

Of these 4, I think the westernmost would still be the west end of Attu.

Ken Oeser




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2b
Re: North/south/east/west points
Fri Nov 13, 2015 8:37 am (PST) . Posted by:
"David Sanger" davidsangerphotography
Interesting question Ken with a few surprises. The plane of the earth's
orbit around the sun is the ecliptic. The first question then is what point
of the US is farthest "above" the ecliptic, or closest to the north
ecliptic pole.

Since the earth's rotational axis is tilted 23.4 from the ecliptic, the
answer is the entire 6633?46.0? parallel, that is, the Arctic Circle. As
the earth rotates every day, every point on the Arctic Circle becomes the
farthest "ecliptic north".

The point farthest beneath the ecliptic north, also varies as the earth
rotates on its axis, but it is the southermonst point in our existing
definition that once a day will be the the farthest "ecliptic south" .

As for easternmost and westernmost, these are not defined in this
co-ordinate system.

david

david sanger photography llc
travel :: stock :: photography :: technology :: media
updates at www.davidsanger.com
t 510-526-0800
m 510-526-2800

On Fri, Nov 13, 2015 at 6:09 AM, Oeserscave@aol.com [cohp] <
cohp@yahoogroups.com> wrote:

>
>
> Ignoring the earth's rotation and current placement of the north and
> south points at the axis of rotation, has anyone come up with the
> north/south/east/westernmost points in the US as regards to it's
> position in apace as it orbits the sun? All maps I've seen of the
> earth ignore the tilt and have the poles at the top and bottom. Many
> globes have the tilt, but would not work well to find the 4 extremes..
> This would require a tilting of the latitudinal/longitudinal lines over
> the surface.
>
> Of these 4, I think the westernmost would still be the west end of Attu.
>
> Ken Oeser
>
>
>
>
>
>
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2c
Re: North/south/east/west points
Fri Nov 13, 2015 8:50 am (PST) . Posted by:
"David Sanger" davidsangerphotography
and the map
https://en.wikipedia.org/wiki/Ecliptic#/media/File:Earths_orbit_and_ecliptic.PNG

david sanger photography llc
travel :: stock :: photography :: technology :: media
updates at www.davidsanger.com
t 510-526-0800
m 510-526-2800

On Fri, Nov 13, 2015 at 8:36 AM, David Sanger <ds@davidsanger.com> wrote:

> Interesting question Ken with a few surprises. The plane of the earth's
> orbit around the sun is the ecliptic. The first question then is what point
> of the US is farthest "above" the ecliptic, or closest to the north
> ecliptic pole.
>
> Since the earth's rotational axis is tilted 23.4 from the ecliptic, the
> answer is the entire 6633?46.0? parallel, that is, the Arctic Circle. As
> the earth rotates every day, every point on the Arctic Circle becomes the
> farthest "ecliptic north".
>
> The point farthest beneath the ecliptic north, also varies as the earth
> rotates on its axis, but it is the southermonst point in our existing
> definition that once a day will be the the farthest "ecliptic south" .
>
> As for easternmost and westernmost, these are not defined in this
> co-ordinate system.
>
> david
>
> david sanger photography llc
> travel :: stock :: photography :: technology :: media
> updates at www.davidsanger.com
> t 510-526-0800
> m 510-526-2800
>
> On Fri, Nov 13, 2015 at 6:09 AM, Oeserscave@aol.com [cohp] <
> cohp@yahoogroups.com> wrote:
>
>>
>>
>> Ignoring the earth's rotation and current placement of the north and
>> south points at the axis of rotation, has anyone come up with the
>> north/south/east/westernmost points in the US as regards to it's
>> position in apace as it orbits the sun? All maps I've seen of the
>> earth ignore the tilt and have the poles at the top and bottom. Many
>> globes have the tilt, but would not work well to find the 4 extremes..
>> This would require a tilting of the latitudinal/longitudinal lines over
>> the surface.
>>
>> Of these 4, I think the westernmost would still be the west end of Attu.
>>
>> Ken Oeser
>>
>>
>>
>>
>>
>>
>
>
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3a
New file uploaded to cohp
Fri Nov 13, 2015 8:17 am (PST) . Posted by:

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the cohp
group.

File : /NC Edgecombe 2ft contours/edgecombe (1).pdf
Uploaded by : tommyl810 <tommyl810@yahoo.com>
Description : Edgecombe 2ft contours

You can access this file at the URL:
https://groups.yahoo.com/neo/groups/cohp/files/NC%20Edgecombe%202ft%20contours/edgecombe%20%281%29.pdf

To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398

Regards,

tommyl810 <tommyl810@yahoo.com>

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4a
Re: third opinion on easternmost
Fri Nov 13, 2015 9:12 am (PST) . Posted by:
"David Sanger" davidsangerphotography
This is where is gets hairy Andy. Lots of surveyed boundaries differ from
the legal definitions.

Here's one on the northern border of Washington where the Washington
Supreme Court ruled that the state line extended north of the 49th Parallel

http://www.historylink.org/index.cfm?DisplayPage=output.cfm&file_id=5199

--

Another is the northern border of California which the Oregon and
California state constitutions define as the 42nd parallel. The actual
survey was done by Daniel Major.

According to an LA Times report (
http://articles.latimes.com/2005/jun/26/local/me-bordertown26 ) on border
discrepancies:

"Some say Major was a heavy drinker -- champagne bottles were later
unearthed at many of his campsites, according to historical accounts.
Others cite his rudimentary surveying equipment.
Traversing more than 300 miles of untamed country to trace a line from the
120th meridian to the Pacific Ocean, Major took astronomical readings with
a sextant on only three occasions, historians say. The result: His border
estimate veered back and forth across the true line by up to half a mile,
looking more like the bite marks made by a set of crooked teeth."

You can read the report of Major's Survey here http://bit.ly/1Y9jAXL

and listen to
http://ijpr.org/post/early-surveyor-marks-meandering-oregon-california-line#stream/0

There are two variations of interest, One near Major's Mile 159 monument
south of Applegate Lake
http://caltopo.com/map.html#ll=42.00623,-123.14322&z=15&b=t veers visibly
to the north

another in the town of New Pine Creek veers to the south (hence affecting
the the southernmost point of Oregon
http://caltopo.com/map.html#ll=41.99535,-120.30052&z=13&b=t

more at
http://www.boston.com/news/nation/articles/2005/09/04/straddling_a_line_in_oregon_or_is_it_california/?page=full

ah such fun !!

david

david sanger photography llc
travel :: stock :: photography :: technology :: media
updates at www.davidsanger.com
t 510-526-0800
m 510-526-2800

On Wed, Nov 11, 2015 at 11:43 AM, Andy Martin oldadit@gmail.com [cohp] <
cohp@yahoogroups.com> wrote:

>
>
> The purist will need to figure where the surveyed border has
> deviated furthest from the ideal border :(
>
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5a
Re: Aleutian Islands
Fri Nov 13, 2015 11:06 am (PST) . Posted by:
davidwmolson2

Scott Surgent provided a good discussion on the topic.

An element of it that I haven't seen yet is that before about 150 years ago nobody felt a need for an international standard in maps and mapping. Each nation made its own maps. Britain defined longitude with respect to an observatory near London, at Greenwich. The French defined longitude with respect to an observatory near Paris. Americans defined longitude with respect to the Naval Observatory then a little west of Washington DC and a little north of Georgetown DC, now inside WashDC. An artifact of longitude defined by Washington DC is the eastern and western longitude boundaries of several states, located at some integer longitude value wrt. Washington DC. -- Those are the ones I've heard of. I wouldn't be surprised if more standards existed.

When they decided that one international standard was needed they met in 1884 and decided on the Greenwich Meridian. I have heard that the trade off for the agreement was that in exchange everyone would adopt France's Metric system of measurement.

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