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#5837 From: "Adam Helman" <helman@...>
Date: Tue Dec 15, 2009 1:16 am
Subject: November Arizona prominences
helman@...
Send Email Send Email
 
This trip report about a pre-Thanksgiving journey comes now
owing to a round of later forays which precluded an earlier completion.

  http://www.cohp.org/personal/Arizona_prominences_November_2009.html

Chris Gilsdorf and I lend particular detail for the Coyote Mountains highpoint
as per a special request: hundreds of waypoints (from a friend of John Klein),
a route map, a few useful photographs, and a complete route description.

The mountains (all at least P2000 feet) -

* Sierra Estrella Range highpoint
* Gu Achi Peak
* Coyote Mountain highpoint
* Kitt Peak
* Wasson Peak

                Adam Helman

[Non-text portions of this message have been removed]

#5836 From: Robert W Packard <Robert.Packard@...>
Date: Thu Dec 10, 2009 6:26 am
Subject: 7 NV summits, 4 of them 2k's
pumprat
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Dec 3: McCullough Mt (7026, P=2187) with Adam Helman.  Amo box register.

Dec 4: Gass Pk (6943, P=2043) with Adam.  R. Carey register, Gass BM, radio
tower and wind sock.

Dec 5: Muddy BM (5431, P=2931) with Adam, Courtney Purcell, his girl friend DB,
and his climbing
companion Matthew Holliman.  BM and reference, Vitz register with many signers.

Dec 6: Jumbo Pk (5761, P=3300) with Adam, Courtney, Matthew.  After some awkward
granite boulders
Courtney belayed us up crack from the north, then belayed us up steep granite
friction pitch followed by
short scramble to summit and register, perhaps left by Andy Martin.  Down same
way via rappells. Low class 5.

Dec 6: Mica Pk (5758, P=1132) with Adam.  Gold Butte BM, registers Vitz 79,
MacLilley 86, many signers.

Dec 8: Frenchman Mt (4052, P=1992) and UN 3942 (P=562) solo.  North area is
higher.  Visited both
areas and in spite of fencing no problem at all in standing on the highest rocks
in both areas.
UN 3942 is only a 322 foot climb from a saddle on the service road leading to
the communications
towers on the two areas on Frenchman.

NOTE:  At this point have done 740 2k's world wide.  So far in 2009: 162
summits, 76 other assorted hp's,
850 miles hiked, 282,000 feet climbed.

Bob


[Non-text portions of this message have been removed]

#5835 From: "robwoodall@..." <robwoodall@...>
Date: Wed Dec 9, 2009 11:55 pm
Subject: Ultra #50 (+2)
rwoodall1960
Offline Offline
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I bagged my 50th Ultra 2 weeks ago in France , closely followed by #51 (Gran
Canaria, Spain) and #52 (Madeira, Portugal) - anything to delay the onset of
winter!

Reports:-
Puy de Sancy: http://www.peakbagger.com/climber/ascent.aspx?aid=87643 (a tour of
the Massif Central)

Pico de las Nieves: http://www.peakbagger.com/climber/ascent.aspx?aid=88080 (an
interesting rock climb)

Pico Ruivo: http://www.peakbagger.com/climber/ascent.aspx?aid=88496 (an insight
into some impressive engineering)

Rob Woodall
UK - still not a single Ultra in the US !

Fun games for all the family - http://www.tiscali.co.uk/play

[Non-text portions of this message have been removed]

#5834 From: "wererichertoo" <wiricha2@...>
Date: Fri Dec 4, 2009 3:20 am
Subject: Tennessee/Virginia trip
wererichertoo
Offline Offline
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Over the Thanksgiving holiday I got a chance to do some mountains that I had on
my list for a while but had never managed to cross off.

11/28:  Camp Creek Bald, TN/NC (E=4884, P=724-764).  This mtn was a contender
for Greene cohp and SE 50 Finest at one point, but I believe it was determined
that Gravel Knob is higher.  We drove through Greeneville, TN and took Viking
Mountain Rd (good gravel) to the ridgetop.  Then we managed to get our Ford
Explorer all the way to the summit.  We actually had planned to turn around at a
pullout and walk from there since the road was very rutted, but 2 SUVs were
following us so we had to gut it out to the summit.  Excellent views and light
snow on top.

11/30: Read Mtn, VA (E=2353, P=1073-1093).  This mountain, which had long been
privately owned, had been on my wish list for years.  After years of
negotiations, Read Mtn became a county park in late 2008.  It is easily
accessible from Interstate-81, exit 150.  I followed the directions from
summitpost, except that you take Alt 220 South for only 3.5 miles to the turn to
Hillview Drive.  The trail is 4 miles rt and is very well marked.  The summit is
about 300 horizontal feet from the end of the trail, and there is a well worn
use-path going to the top.  With the leaves off the trees, views were quite
good.  Despite the hike's easy nature, it was actually a major personal
accomplishment for me, for 2 reasons.  First it was the last Virginia P1K on
public land that I had not done.  Second, I broke my hip in a bicycle accident
on Oct 31 and had been on crutches until a few days before Thanksgiving.  So
being able to hike 4 miles (with hiking poles, not to mention a large titanium
rod implanted in my hip) only 4 weeks after the accident was pretty amazing. 
Without the surgically implanted rod, I would not have been able to walk for 3
months.  Ain't modern medical technology grand?

Ryan

#5833 From: "Adam Helman" <helman@...>
Date: Wed Dec 2, 2009 5:27 am
Subject: Coyote Mountains highpoint, Arizona
helman@...
Send Email Send Email
 
The elevation (and thus prominence) of this mountain
may require a 3 foot boost:  while atop the summit
last week Chris Gilsdorf and I found the 6,529 foot benchmark
to be 3 feet below the highest natural ground.

Examination of the Arizona 2,000+ foot prominence list
indicates that no rank-switching occurs with this upshift
in published summit elevation.

     http://www.peaklist.org/USlists/AZP2000.html

We have a full report for our five peak trip - yet defer
sharing it until all the available photographs are in-place.

Adam Helman



[Non-text portions of this message have been removed]

#5832 From: "tworth87" <tworth87@...>
Date: Wed Dec 2, 2009 2:20 am
Subject: Re: Steepness numbers for AZ
tworth87
Offline Offline
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Thanks David. In the last month or so I've gotten a few more states posted. I
like these stats as a compliment to the ORS data. Looking at a localized area is
a good way to "zoom in", whereas ORS is great for looking at the big picture and
comparing summits on a global scale.

Yes, as with Arizona, Colorado also has some high scoring canyon rim peaks in
Dinosaur NM and Black Canyon NP, mixed in with the alpine summits.



--- In prominence@yahoogroups.com, "Metzler, David" <metzler@...> wrote:
>
> Nice work, Tim! Nice to see how much stuff you now have on your site. Not
surprising that the AZ numbers are dominated by the Grand Canyon---same is true
for ORS (aka spire measure).
>
> David M.
>
>
> ________________________________
> From: prominence@yahoogroups.com [mailto:prominence@yahoogroups.com] On Behalf
Of Tim Worth
> Sent: Tuesday, December 01, 2009 1:38 PM
> To: Robert W. Packard; Andy Martin
> Cc: prominence@yahoogroups.com
> Subject: [prominence] Steepness numbers for AZ
>
>
>
> This goes out to Bob P, Andy M, and any other AZ desert rats out there.
>
> Ran some vertical drop numbers on AZ peaks which may be of interest. Be aware
the files are a bit large(5+ MB). Feel free to let me know if you see anything
out of whack, as I have little first hand knowledge of these desert peaks. Thx,
Tim
>
> http://ned-files.com/az/files/az.html
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

#5831 From: "tworth87" <tworth87@...>
Date: Wed Dec 2, 2009 2:17 am
Subject: Re: Steepness numbers for AZ
tworth87
Offline Offline
Send Email Send Email
 
Hey Adam - Yeah, I registered the domain(cheaply) and wrote some simple HTML and
a few scripts. I've kept the pages basic to spend more time on the content.

--- In prominence@yahoogroups.com, "Adam Helman" <helman@...> wrote:
>
>  Hello Tim,
>
>     Did you purchase the domain "ned-files.com" and design, construct the web
pages?
>
>          Adam H.
>

#5830 From: "Metzler, David" <metzler@...>
Date: Tue Dec 1, 2009 10:14 pm
Subject: RE: Steepness numbers for AZ
metzlerdavid
Offline Offline
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Nice work, Tim! Nice to see how much stuff you now have on your site. Not
surprising that the AZ numbers are dominated by the Grand Canyon---same is true
for ORS (aka spire measure).

David M.


________________________________
From: prominence@yahoogroups.com [mailto:prominence@yahoogroups.com] On Behalf
Of Tim Worth
Sent: Tuesday, December 01, 2009 1:38 PM
To: Robert W. Packard; Andy Martin
Cc: prominence@yahoogroups.com
Subject: [prominence] Steepness numbers for AZ



This goes out to Bob P, Andy M, and any other AZ desert rats out there.

Ran some vertical drop numbers on AZ peaks which may be of interest. Be aware
the files are a bit large(5+ MB). Feel free to let me know if you see anything
out of whack, as I have little first hand knowledge of these desert peaks. Thx,
Tim

http://ned-files.com/az/files/az.html

[Non-text portions of this message have been removed]





[Non-text portions of this message have been removed]

#5829 From: "Adam Helman" <helman@...>
Date: Tue Dec 1, 2009 9:11 pm
Subject: Steepness numbers for AZ
helman@...
Send Email Send Email
 
Hello Tim,

     Did you purchase the domain "ned-files.com" and design, construct the web
pages?

          Adam H.

   ----- Original Message -----
   From: Tim Worth
   To: Robert W. Packard ; Andy Martin
   Cc: prominence@yahoogroups.com
   Sent: Tuesday, December 01, 2009 12:38 PM
   Subject: [prominence] Steepness numbers for AZ



   This goes out to Bob P, Andy M, and any other AZ desert rats out there.

   Ran some vertical drop numbers on AZ peaks which may be of interest. Be aware
the files are a bit large(5+ MB). Feel free to let me know if you see anything
out of whack, as I have little first hand knowledge of these desert peaks. Thx,
Tim

   http://ned-files.com/az/files/az.html

   [Non-text portions of this message have been removed]





[Non-text portions of this message have been removed]

#5828 From: Tim Worth <tworth87@...>
Date: Tue Dec 1, 2009 8:38 pm
Subject: Steepness numbers for AZ
tworth87
Offline Offline
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This goes out to Bob P, Andy M, and any other AZ desert rats out there.

Ran some vertical drop numbers on AZ peaks which may be of interest. Be aware
the files are a bit large(5+ MB). Feel free to let me know if you see anything
out of whack, as I have little first hand knowledge of these desert peaks. Thx,
Tim

http://ned-files.com/az/files/az.html





[Non-text portions of this message have been removed]

#5827 From: Gabriel Couët <gabriel.couet@...>
Date: Tue Dec 1, 2009 3:34 pm
Subject: National Geodectic website for Canadian BMs?
gabriel.coue...
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Yes.



It can be found here <http://www.geod.rncan.gc.ca/online_data_e.php>
although you need to submit your info to register for access. It is free but
I have no idea if you need to be a Canadian in order to register. I didn’t
have any trouble myself. In any case, if you want info on some BMs in a
particular area, I can always provide you with a list and coordinates if you
give me the Quads you need.



There are many things to consider regarding those benchmarks. First, NRCan’s
GSD shares the geodetic tasks with the provinces, and their network isn’t
complete by itself. Browsing through their lists, you won,t be able to find
the info on all BMs that can be found in the wild. I don,t know for other
provinces, but Québec is VERY mercantile about their geodata. To have access
to the provincial BM database, you have to fork 500 CAD per year, which is
ludicrous for information that should be public domain. I am quite furious
about this issue myself as the most precise surveying is done by MRNFQ.



In any case, you will be able to find recent info in many cases, but some of
the altimetric data available from NRCan is very old, dating to the early
1900’s in many cases. That Altimetric data is based on the provincial
surveys (because NRCan takes mostly care of the planimetric data) and well,
in Québec’s case, they won’t release it to the public.



Regards,



Gabriel Couët,

Quebec





[Non-text portions of this message have been removed]

#5826 From: Roy Schweiker <roy.schweiker@...>
Date: Tue Dec 1, 2009 3:17 am
Subject: National Geodectic website for Canadian BMs?
accidentlwan...
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Does Canada have a website for Horizontal and Vertical Control points and
BM's?

____________________________________________________________
Weight Loss Program
Best Weight Loss Program - Click Here!
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#5825 From: "Adam Helman" <helman@...>
Date: Sun Nov 29, 2009 7:08 pm
Subject: Lino Lacedelli Dies at 83; One of First to Scale K2
helman@...
Send Email Send Email
 
This story about a most controversial
K2 expedition  is well worth reading -

http://www.nytimes.com/2009/11/29/sports/othersports/29lacedelli.html?_r=1&emc=e\
ta1

Adam Helman

[Non-text portions of this message have been removed]

#5824 From: "Bob Bolton" <rfbolton@...>
Date: Sat Nov 28, 2009 7:48 am
Subject: RE: [cohp] chance encounters
rfbolton
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Roy S> I have often met guidebook editors.while hiking



Roy, you reminded me of by far the most surreal day of my life. One of the
Northwest's iconic guidebook writers, Harvey Manning, played a part in the
story. 18 years after the experience I finally wrote about it. If anyone is
interested, here's the link:



http://rfbolton.googlepages.com/26MILESc.htm



Bob



[Non-text portions of this message have been removed]

#5823 From: Roy Schweiker <roy.schweiker@...>
Date: Fri Nov 27, 2009 4:00 am
Subject: Re: US Counties with 50+ peaks with 1000' prominence
accidentlwan...
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> The following states don't have any county with 50 1k+
> peaks. The leading county is shown. Most eastern
> states are not on listsofjohn.com, thus are not
> listed.
>
>NY Essex  6 36

Here are a few possible answers, Aaron would have more exact ones

MA    Berkshire   1   3

ME  Oxford  3  25

NH   Grafton   6    27

VT    Bennington  2  9

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Weight Loss Program
Best Weight Loss Program - Click Here!
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#5822 From: Andy Martin <oldadit@...>
Date: Thu Nov 26, 2009 4:47 pm
Subject: US Counties with 50+ peaks with 1000' prominence
oldadit
Offline Offline
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To: cohp, prominence, several BCC

	 Hikers who are looking for goals to
	 pursue close to home can come up with
	 a variety of projects in the county they
	 live in. Eg:

		 1. The highest peaks
		 2. The most prominent peaks
		 3. All peaks with 300' prominence.
		 4. All peaks with 200' prominence.
		 5. All closed contours (yikes!)
		 6. Quadrangle highest points
		 7. Township (6 x 6 mile) highest points
		 8. Zip code area highest points
		 9+ ... use your imagination ...

	 John Kirk's web site http://listsofjohn.com/
	 is a great place to get information for
	 items 1, 2 and 3 on western states. Simply

		 1. Go to http://www.listsofjohn.com/
		 2. In lower left Search by State: XX
		 3. Search
		 4. Use the four controls in upper left
		    to investigate your county.


	 I took particular interest in the 1000' prominence
	 peaks, and used John's information to compile
	 the listing below. It shows the counties in the
	 USA with at least 50 1K peaks.

	 There are several interesting trivia questions:


	 1. Which county has the most 1K+ peaks ?
	    Hint - it is not Nye NV or San Bernadino CA.

	 2. Which eastern county has more 1K peaks than
	    the best county that UT or NM can produce ?

	 3. Which county has the highest percent
	    of 5th class peaks in its 1K list ?


				  - Andy








DRAFT USA Counties with 50 or more peaks of 1K prominence. DRAFT
	 (missing AK)

	 Information from John Kirk's site http://listsofjohn.com
	 Compiled by Andy Martin, 11/26/2009


			 PROMINENCE
STATE COUNTY  2K+ 1K+

MT Flathead 32 135
MT Lincoln  14 70
MT Beaverhead  7 60
MT Lewis & Clark  9 50
MT Glacier  10 45

NV Nye  23 117
NV Elko  30 88
NV White Pine 20 67
NV Lincoln  14 66
NV Clark  10 55

WA Okanogon 20 107
WA Chelan  21 92
WA Whatcom  22 83
WA Skagit  17 65
WA Snohomish 12 63
WA King 	 8 50

CA San Bernadino 22 100
CA Inyo  19 98
CA Siskiyou 15 77
CA Riverside 11 54
CA Fresno 	 4 52
CA Trinity 	 9 49
CA Shasta 	 6 48

ID Custer  15 86
ID Idaho  12 82
ID Lemhi 	 8 61
ID Valley 	 8 47

WY Park  10 72
WY Teton  5 52


	 All counties are listed for AZ
					 Technical stoppers
					 Info from Bob Packard
AZ Pima  11 59 1 Montezuma Head
AZ Maricopa 5 55   (Eagletail)
AZ Mohave  9 53 2 The Dome, 4630 -
				           "Clay Tanks Castle"
AZ Coconino 4 44 9
AZ Yavapai  6 38
AZ Cochise  11 34
AZ Graham  6 28
AZ Pinal  2 26   (Weavers Needle)
AZ Yuma  5 26
AZ La Paz  4 25 1 Courthouse Rock
AZ Gila  6 24
AZ Greenlee 2 14
AZ Apache  4 12 1 Meridian Butte
AZ Santa Cruz 1 10
AZ Navajo 	 5 3 Agathla, East Mitten,
				           Boot Mesa

OR Klamath  14 51


	 The following states don't have any county with 50 1k+
	 peaks. The leading county is shown. Most eastern
	 states are not on listsofjohn.com, thus are not
	 listed.

CO Gunnison 16 42

TX Brewster 5 39

NY Essex  6 36

UT Tooele  10 35

NM Catron  3 27

SD Pennington 1  2

#5821 From: "Edward \"7.389056099\" Earl" <esquared@...>
Date: Thu Nov 26, 2009 3:57 am
Subject: Re: coincidental climbing encounters
edwardurl
Offline Offline
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> This morning I was in Gila Bend, Arizona
> purchasing gasoline for the 300 mile drive home
> after bagging 5 peaks in the Sonoran desert
> since last Saturday. [*1 see below]
>
> Suddenly a group of 4 peakbagging friends appear -
> Gail Hanna, Richard Carey, Mark Adrian,
> and Shelley Rogers ... all from San Diego ...
> at the start of their own climbing agenda.
>
> Mark had recognized my pickup truck by its
> unique "DENALY" license plates.
>
> Now I admit that Gila Bend is a natural location
> for encountering others when the common goal
> is climbing wintertime Arizona summits.
>
> However the seeming coincidence is noteworthy and,
> at the time, was quite welcome.
>
That's very interesting. A few days ago Mark sent a message saying that he was
soon to depart for a Txgiving peakbagging trip in AZ. Knowing that you too were
planning to be in AZ at around the same time, I assumed that you were planning
to make the trip together!


       Edward "7.389056099" Earl
       esquared@...
       http://home.earthlink.net/~esquared

#5820 From: "Adam Helman" <helman@...>
Date: Thu Nov 26, 2009 3:46 am
Subject: coincidental climbing encounters
helman@...
Send Email Send Email
 
This morning I was in Gila Bend, Arizona
purchasing gasoline for the 300 mile drive home
after bagging 5 peaks in the Sonoran desert
since last Saturday. [*1 see below]

Suddenly a group of 4 peakbagging friends appear -
Gail Hanna, Richard Carey, Mark Adrian,
and Shelley Rogers ... all from San Diego ...
at the start of their own climbing agenda.

Mark had recognized my pickup truck by its
unique "DENALY" license plates.

Now I admit that Gila Bend is a natural location
for encountering others when the common goal
is climbing wintertime Arizona summits.

However the seeming coincidence is noteworthy and,
at the time, was quite welcome.

    **********************************************

What encounters in either nature or where
men live and work have others experienced?

There has been very little activity at this forum;
and I wish to enliven the air a bit. *2

HAPPY THANKSGIVING,
                                       Adam Helman


*1 A trip report is forthcoming.

*2 Message sent to both cohp and prominence E-groups.



[Non-text portions of this message have been removed]

#5819 From: "robwoodall@..." <robwoodall@...>
Date: Wed Nov 25, 2009 1:31 pm
Subject: Re: [rhb] Indonesian peaks
rwoodall1960
Offline Offline
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Daniel Patrick Quinn wrote
>As some of you will know I've been living in Jakarta since January - a
fantastic place despite what you might read on wikipedia!
Myself and another English chap have been working on a website for peaks in
Indonesia with a prominence of 1000m (which we call Ribus - "ribu" is Indonesian
for 'thousand") plus lesser (but interesting) mountain/volcano summits.
We are still only mid-way through the analysis but the website is up and running
already.... www.gunungbagging.com

Great site, Dan - the coding and of course the content. I notice something new
every time I look at it - this time the hill-specific hyperlinks to SP,
peak-bagger pages / reports etc.

I've taken the liberty of cross-posting to the [prominence] group as your site
has been developed a fair bit since it was last publicised.

Regards
Rob Woodall
Money advice when you need it - http://www.tiscali.co.uk/money

[Non-text portions of this message have been removed]

#5818 From: Andy Martin <oldadit@...>
Date: Wed Nov 25, 2009 12:29 am
Subject: Peacock Peak TR from Guy Dahms
oldadit
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Guy did this peak from the west side.


(Guy Dahms)
I did the peak from the west (Kingman) side.  It was a straightforward
hike up a ridge, with some easy scrambling at the top.  A bit of brush,
but not bad.  A couple hours up.  I started at the east end of "Jan
Road".  The access is through the Kingman (Mojave County) airport.  From
the airport access road, I think the sequence of roads taken was
"Shipping Lane" (north; paved), Bruce Road" (dirt, northwest), "Topeka
Road" (dirt; NE along the east side of the railroad tracks), and "Jan
Road" (dirt; east to the base of the mountains).  Jan Road can also be
accessed by the grid of development roads NE of the airport.  Jan Road
"T's" into "Hensz Way" at it's east end.  I parked 100-200 yeards south,
and walked up the obvious ridge heading east towards the peak.  As on
the east side, there are houses nearby.

#5817 From: Robert W Packard <Robert.Packard@...>
Date: Wed Nov 18, 2009 5:54 pm
Subject: RE: 2 more AZ summits
pumprat
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Nov 15 with Andy Martin:  Jerusalem Mt (5294, P=1014+).  9.25h, 11m, 3300f.
We camped for this on BLM land just north of the Gila River and just south of
the
Needles Eye Wilderness.

In Andy's list this gives me 416/431 1k pks in AZ.  Andy uses "clean"
prominence.
In Lists of John this gives me 433/449 1k pks in AZ.  John uses interpolated
prominence.
The remaining 15 or 16 pks are or appear to be technical.  5 are Grand Canyon
interior buttes.
9 are on the Navajo IR and 4 of THESE are on the Face Canyon Quad.  2 are in
southern AZ.

Nov 17 solo:  Sheep Mt (3567, P=807+) on the Mormon Flat Quad.  This summit is
north of
Canyon Lake.  From AZ 87 I drove FR 143, the road leading in to Four Peaks, E 2
miles, then
4.5 miles S on FR 401 (both roads passable by regular car) to Cottonwood Camp, a
large
open area, popular as a staging area for ATV enthusiasts, at 1900 feet.  I hiked
S down
Cottonwood Creek (sandy washbed with ATV tracks) 2.5 miles to intersection with
Cane
Spring Canyon at 1700 feet.  Just S of this intersection I got up onto the
plateau area S of
Cane Spring Canyon and bushwhacked (cholla city) E another 2.5 miles and climbed
to the
summit, no problem.  Saw no indication of prior ascent, seeing no cairn or
register, but it must
have been climbed before.  I built a cairn and left a register.  On the return I
got into Cane
Spring Canyon and was surprised at the large amount of clear water flowing from
Hidden Water
Spring.  Many large cottonwoods and marsh vegetation.  9.5h, 11m, 2100f.

#5816 From: "Adam Helman" <helman@...>
Date: Fri Nov 13, 2009 1:50 am
Subject: P4000 cell map
helman@...
Send Email Send Email
 
The P4000 foot cell map is indeed a "Mercator-like" projection in that the
pixel distance between meridians of longitude is independent of latitude.
(However, unlike a Mercator projection, parallels of latitude remain equally
spaced).

  Here are the detailed calculations.

  Montana northeast tip at Canadian border  (1450, 13)   N 48.99987 W 104.04866
      Idaho northwest tip at Canadian border   (541,  13)   N 48.99918 W
117.03234

     Colorado southeast tip (1590, 1106)  N 36.99302 W 102.04211
         Utah  southwest tip   (750, 1106)  N 37.00038 W 114.05059


    Longitude per pixel along northern tie-line

        (117.03234 - 104.04866) / (1450 - 541) =  12.98368 / 909  = 0.0142835
degree

    Longitude per pixel along southern tie-line

        (114.05059 - 102.04211) / (1590 - 750) =  12.00848 / 840  = 0.0142958
degree


    These values differ by 1 part in roughly 1200, which is within the error
  caused by mapping surface coordinates to pixel space.

      *******************************************

    These results are consistent with the hypothesis that individual quadrangles
had tops and bottoms that were matched in width prior to their joining.
Although for a single quadrangle that results in a most minor distortion, over
the
latitudinal span of western states the cumulative effect is significant.

     AAddaamm






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