Video clips
Marhofn articles relevant to the Hills Database
Other Marhofn articles
Old articles
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A scientific and statistical treatment of the sources of error in height measurements by altimeter. A procedure for correcting for temperature and barometric drift is described and tested in the hills. A shortened version, without the maths, was published in TAC43.
Knight's Peak has now been re-measured by the OS. This does not change the conclusions in the article.
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Why doing the 284 Munros gives you only a 21% probability of having climbed all the significant Scottish hills over 3,000ft. A slightly improved version of the author's article in TAC36.
Since the article was written, the height of some borderline hills has been measured accurately by differential GPS. In 2007, surveys of Foinaven and Beinn Dearg confirmed that these hills are below Munro height, which increases the 21% figure mentioned above to 90%. However a further round of surveys has resulted in the demotion of Sgurr nan Ceannaichean from Munro to Corbett, while Mynydd Graig Goch in Wales has been shown to be above 2,000 feet. It is likely that in the not too distant future the status of all borderline hills in the most popular lists will be established beyond doubt, but in the meantime you should climb the subs!
An examination of Naismith's Rule
Postponed indefinitely: a statistical analysis of hillwalkers' data to test the performance of Naismith's Rule in calculating the time taken to complete a walk, and examine alternative models.
The data were analysed in 2000 but the best fitting models are not very intuitive. For those with a mathematical bent, results are available in Excel from the author.
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