Without getting into the math, I'd like to discuss some of the key statements in Adam's analysis which I find to be misleading. In some cases he is aware of...
In the same vein: in the UK, typically spot heights from photogrammetry (brown on UK 1:25k maps) are accurate within approx 3 metres (contours likewise);...
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Adam Helman
helman@...
May 2, 2012 8:11 pm
Hello Roy and Rob, I've read your comments and it's easy for me to make minor changes to the text addressing them. Thanks for sharing them! Here are replies to...
Hello Adam ... looks like 1001m and you interpolate it as 1005 and the summit looks like 1501m and you interpolate it as 1505m, it would take a strange piece...
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Adam Helman
helman@...
May 2, 2012 8:42 pm
What IS "estimated interpolation" Rob? Do you look at the map, guess at the distance of your saddle to both the 1000 and 1010 m contours, and then conclude, ...
Your understanding is correct, Adam, and it applies to pretty much all listed UK summits (approx 16,500 listed P30m summits!) In the cited example the saddle...
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Adam Helman
helman@...
May 2, 2012 9:25 pm
Your "estimated interpolation" deserves mention in the article, Rob. I'll find a reasonable means to that end soon enough ... so long as I am not tied-down...
... Back when more things were done graphically rather than by computer, one way of finding a curve to fit certain points was to use a stiff strip of wood or...
... Or might get listed inaccurately ... One difference between pure mathematics and experimental science is data outside the expected pattern which I will...
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Adam Helman
helman@...
May 3, 2012 5:37 am
Hello Roy S. et al..... Several comments here, ordered haphazardly. 1. The "cubic spline fit" seems to have been a popular variety. 2. The VA example is most...
Hi, I have sort of followed this exchange and I guess it is appropriate to mention one aspect that seems quite relevant, at least here in Norway. In all lists...
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helman@...
May 4, 2012 3:22 am
Hello Petter, I will determine how to incorporate your observations into the current article. It was composed with USA-type map contours and elevations...
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Adam Helman
helman@...
May 7, 2012 7:04 pm
Hello Petter B, all - I've inserted your comments about how lake elevations refine saddle elevation estimates - ...
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Adam Helman
helman@...
May 7, 2012 7:10 pm
Is this a new theme: Internal links WITHIN a web page are NOT properly handled by the E-group's machinery? Every hyperlink in the message below ONLY goes to...
Those links with the various hash values work fine for me. I am taken to the appropriate point on the page, not just to the top of the page. I've used the...
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Adam Helman
helman@...
May 10, 2012 1:14 am
Then "something" is wrong with my E-mail application, Papabear : linking directly from your message only gives me the web page's address yet without the...
Sounds like it. I get the proper result both from the web browser looking at this Yahoo Group, or the email version of the same. I use Outlook Express email...
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Adam Helman
helman@...
May 10, 2012 1:40 am
I just mailed to MYSELF a message containing an internal web page address ("#New") .... and the returned message, when clicked-on, leads to JUST the web page...
... the appropriate point on the page, not just to the top of the page. ... from them when I send an email blast about something on my blog. I'm using Gmail...
Mountain lovers looking for some nice computer wallpaper might like some of the images listed below. They are photos of the World 50 by prominence peaks. (and...
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Adam Helman
helman@...
May 15, 2012 3:04 am
A statistician friend of Rob Woodall provided astute comments on this manuscript. I've since addressed his concerns by relegating "gray zone" peak...
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Adam Helman
helman@...
May 15, 2012 5:54 pm
Hello John R, Thanks for replying. I've cc'ed the prominence E-group since my reply is of general interest. The term "interpolated" indeed sounds haughty - yet...
... I am not sure that an ordinary spot elevation is known to be more accurate than an ordinary contour - just more precise However a survey marker does have...
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Adam Helman
helman@...
May 15, 2012 6:32 pm
Hello Roy, If spot elevations (in the USA) are not more accurate than elevation contours then there are two immediate consequences - 1. Consider two nearby...
I'm wondering if anyone out there is interested in attempting Diamond Peak, Idaho this summer. Diamond is an ultra-prom. I would like to go sometime between...
http://www.guardian.co.uk/news/datablog/interactive/2012/may/23/world-highest-mountains-interactive-map A pity about the "highest" label, but the prominence...
A while back Andy Martin sent me a list of the 207 most isolated summits in Arizona, which he had generated somehow from LoJ. Ever since then I have been...
Recently I located a greater sink in MA, at Succonessett Pond on Cape Cod. Andy Martin identified two others of equal depth nearby. Two of these three have...
