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#1




Rough formula for walk 'difficulty'
I'm planning next summer's walk with my wife of the SW Coastal path,
from Westward Ho! to Trevenoe. I'm in the course of making estimates of mileage and gross ascent and descent (ft), both based on my fairly careful plotting of the path and using Google Earth's elevation profile. Average mileage will be relatively short at about 9.0 as we expect to set off daily at around 10:00 and arrive at the next B&B by about 16:00, with plenty of stops en route. I'd like to come up with some sort of 'difficulty' rating, so that I can then even out the days before planning accommodation. So I'd be interested in opinions on a realistic formula to use please. Also, does anyone have actual GPS data for this section that they can share please? The few GPX and KML files I've found so far are too rough for my planning, particularly elevation. Based on the previous two sections we've walked (Exmouth to Poole Harbour) and Minehead to Westward Ho!, gross ascent is the most significant factor, so I need to get that estimated fairly accurately.  Terry, East Grinstead, UK 
#2




Rough formula for walk 'difficulty'
On 12/10/2015 20:53, Terry Pinnell wrote:
I'm planning next summer's walk with my wife of the SW Coastal path, from Westward Ho! to Trevenoe. I'm in the course of making estimates of mileage and gross ascent and descent (ft), both based on my fairly careful plotting of the path and using Google Earth's elevation profile. Average mileage will be relatively short at about 9.0 as we expect to set off daily at around 10:00 and arrive at the next B&B by about 16:00, with plenty of stops en route. I'd like to come up with some sort of 'difficulty' rating, so that I can then even out the days before planning accommodation. So I'd be interested in opinions on a realistic formula to use please. Also, does anyone have actual GPS data for this section that they can share please? The few GPX and KML files I've found so far are too rough for my planning, particularly elevation. Based on the previous two sections we've walked (Exmouth to Poole Harbour) and Minehead to Westward Ho!, gross ascent is the most significant factor, so I need to get that estimated fairly accurately. Why not get yourself a copy of something like Anquet (http://www.anquet.com/), which will let you plot your route and produce figures for mileage and height gain/loss (and even timings, but IMHO, the timings are very subjective). Allan (no connection with Anquet other than as a user) 
#3




Rough formula for walk 'difficulty'
Allan wrote:
On 12/10/2015 20:53, Terry Pinnell wrote: I'm planning next summer's walk with my wife of the SW Coastal path, from Westward Ho! to Trevenoe. I'm in the course of making estimates of mileage and gross ascent and descent (ft), both based on my fairly careful plotting of the path and using Google Earth's elevation profile. Average mileage will be relatively short at about 9.0 as we expect to set off daily at around 10:00 and arrive at the next B&B by about 16:00, with plenty of stops en route. I'd like to come up with some sort of 'difficulty' rating, so that I can then even out the days before planning accommodation. So I'd be interested in opinions on a realistic formula to use please. Also, does anyone have actual GPS data for this section that they can share please? The few GPX and KML files I've found so far are too rough for my planning, particularly elevation. Based on the previous two sections we've walked (Exmouth to Poole Harbour) and Minehead to Westward Ho!, gross ascent is the most significant factor, so I need to get that estimated fairly accurately. Why not get yourself a copy of something like Anquet (http://www.anquet.com/), which will let you plot your route and produce figures for mileage and height gain/loss (and even timings, but IMHO, the timings are very subjective). Allan (no connection with Anquet other than as a user) Thanks, but I already have 'something like Anquet'  actually rather better IMO, MemoryMap. As well as Google Earth. GPS Utility and several other tools. But these are irrelevant to my query.  Terry, East Grinstead, UK 
#4




Rough formula for walk 'difficulty'
Jell wrote:
Terry That feels a bit dismissive, as a good mapping product (be it Anquet, Memory Map, OS Maps or Google Earth) is likely to be part of the answer. I am not really sure what you are after. You have asked for a "realistic formula", so I guess you are looking for some sort of numerical output. A scale from 1 to 10 of "difficulty"? A way of assessing likely speed for a section? Can you explain a bit more? Jell On Tuesday, 13 October 2015 12:54:15 UTC+1, Terry Pinnell wrote: Allan wrote: On 12/10/2015 20:53, Terry Pinnell wrote: I'm planning next summer's walk with my wife of the SW Coastal path, from Westward Ho! to Trevenoe. I'm in the course of making estimates of mileage and gross ascent and descent (ft), both based on my fairly careful plotting of the path and using Google Earth's elevation profile. Average mileage will be relatively short at about 9.0 as we expect to set off daily at around 10:00 and arrive at the next B&B by about 16:00, with plenty of stops en route. I'd like to come up with some sort of 'difficulty' rating, so that I can then even out the days before planning accommodation. So I'd be interested in opinions on a realistic formula to use please. Also, does anyone have actual GPS data for this section that they can share please? The few GPX and KML files I've found so far are too rough for my planning, particularly elevation. Based on the previous two sections we've walked (Exmouth to Poole Harbour) and Minehead to Westward Ho!, gross ascent is the most significant factor, so I need to get that estimated fairly accurately. Why not get yourself a copy of something like Anquet (http://www.anquet.com/), which will let you plot your route and produce figures for mileage and height gain/loss (and even timings, but IMHO, the timings are very subjective). Allan (no connection with Anquet other than as a user) Thanks, but I already have 'something like Anquet'  actually rather better IMO, MemoryMap. As well as Google Earth. GPS Utility and several other tools. But these are irrelevant to my query.  Terry, East Grinstead, UK On Tuesday, 13 October 2015 12:54:15 UTC+1, Terry Pinnell wrote: Allan wrote: On 12/10/2015 20:53, Terry Pinnell wrote: I'm planning next summer's walk with my wife of the SW Coastal path, from Westward Ho! to Trevenoe. I'm in the course of making estimates of mileage and gross ascent and descent (ft), both based on my fairly careful plotting of the path and using Google Earth's elevation profile. Average mileage will be relatively short at about 9.0 as we expect to set off daily at around 10:00 and arrive at the next B&B by about 16:00, with plenty of stops en route. I'd like to come up with some sort of 'difficulty' rating, so that I can then even out the days before planning accommodation. So I'd be interested in opinions on a realistic formula to use please. Also, does anyone have actual GPS data for this section that they can share please? The few GPX and KML files I've found so far are too rough for my planning, particularly elevation. Based on the previous two sections we've walked (Exmouth to Poole Harbour) and Minehead to Westward Ho!, gross ascent is the most significant factor, so I need to get that estimated fairly accurately. Why not get yourself a copy of something like Anquet (http://www.anquet.com/), which will let you plot your route and produce figures for mileage and height gain/loss (and even timings, but IMHO, the timings are very subjective). Allan (no connection with Anquet other than as a user) Thanks, but I already have 'something like Anquet'  actually rather better IMO, MemoryMap. As well as Google Earth. GPS Utility and several other tools. But these are irrelevant to my query.  Terry, East Grinstead, UK Well, I certainly didn't mean to be 'dismissive', if that's how it came across. But I thought I'd been clear that I was well equipped with appropriate mapping software. And I also assumed that the meaning of a 'difficulty rating' would be well understood by most walkers. Essentially a refinement of the commonplace, like "That was a hard walk", "An easy walk", "An extremely challenging walk", "I was completely knackered", etc. But numerically expressed, for the reason I gave: "... even out the days before planning accommodation". A formula? As a purely hypothetical example, if M = Miles, A = Gross Ascent in feet, and D = Gross Descent in feet, a simple formula for Rating = R might be: R = (M*1000 + 3*A + D)/1000 A 9 mile walk with 2000/1900 feet of gross ascent/descent respectively would then have a difficulty rating of 16.9 And a 7 mile walk with 3000/3000 would be rated 19.0. That oversimplistic formula would imply the shorter walk was harder (more tiring, more difficult to complete, longer to finish, etc). And if it helps further to clarify, here's what the data looks like after a few hours work; https://www.dropbox.com/s/4lihgrhjjd...ns01.jpg?dl=0  Terry, East Grinstead, UK 
#5




Rough formula for walk 'difficulty'
On 20151012 20:53, Terry Pinnell wrote:
I'm planning next summer's walk with my wife of the SW Coastal path, from Westward Ho! to Trevenoe. I'm in the course of making estimates of mileage and gross ascent and descent (ft), both based on my fairly careful plotting of the path and using Google Earth's elevation profile. Average mileage will be relatively short at about 9.0 as we expect to set off daily at around 10:00 and arrive at the next B&B by about 16:00, with plenty of stops en route. I'd like to come up with some sort of 'difficulty' rating, so that I can then even out the days before planning accommodation. So I'd be interested in opinions on a realistic formula to use please. The usual formula for calculating time is Naismith's rule. https://en.wikipedia.org/wiki/Naismith's_rule Allow 1 hour for every 5 kilometres (3.1 mi) forward, plus 1 hour for every 600 metres (2,000 ft) of ascent. There are additional corrections to allow for terrain, or fitness, or downhills. 
#6




Rough formula for walk 'difficulty'
Craig Wallace wrote:
On 20151012 20:53, Terry Pinnell wrote: I'm planning next summer's walk with my wife of the SW Coastal path, from Westward Ho! to Trevenoe. I'm in the course of making estimates of mileage and gross ascent and descent (ft), both based on my fairly careful plotting of the path and using Google Earth's elevation profile. Average mileage will be relatively short at about 9.0 as we expect to set off daily at around 10:00 and arrive at the next B&B by about 16:00, with plenty of stops en route. I'd like to come up with some sort of 'difficulty' rating, so that I can then even out the days before planning accommodation. So I'd be interested in opinions on a realistic formula to use please. The usual formula for calculating time is Naismith's rule. https://en.wikipedia.org/wiki/Naismith's_rule Allow 1 hour for every 5 kilometres (3.1 mi) forward, plus 1 hour for every 600 metres (2,000 ft) of ascent. There are additional corrections to allow for terrain, or fitness, or downhills. Thanks Craig, that will get me started. Time taken should be a good measure of 'difficulty'. But I believe Naismith came up with that in 1892? I was wondering if there have been any refinements in 123 years?  Terry, East Grinstead, UK 
#7




Rough formula for walk 'difficulty'
On Mon, 12 Oct 2015 20:53:32 +0100, Terry Pinnell wrote:
I'm planning next summer's walk with my wife of the SW Coastal path, from Westward Ho! to Trevenoe. I'm in the course of making estimates of mileage and gross ascent and descent (ft), both based on my fairly careful plotting of the path and using Google Earth's elevation profile. Average mileage will be relatively short at about 9.0 as we expect to set off daily at around 10:00 and arrive at the next B&B by about 16:00, with plenty of stops en route. I'd like to come up with some sort of 'difficulty' rating, so that I can then even out the days before planning accommodation. So I'd be interested in opinions on a realistic formula to use please. Also, does anyone have actual GPS data for this section that they can share please? The few GPX and KML files I've found so far are too rough for my planning, particularly elevation. Based on the previous two sections we've walked (Exmouth to Poole Harbour) and Minehead to Westward Ho!, gross ascent is the most significant factor, so I need to get that estimated fairly accurately. When I walked sections of the path I used the book from http:// shop.southwestcoastpath.org.uk/ which I found very useful it breaks down the walk to daily sections and gives a grading for the route. The caveat is that the grading of the route may not match your own, which you will find out after a couple of days when you have walked a couple of sections, which is probably too late by then! The ascent etc. of each section is also given. I found the 'severe' grade easy, I normally walk in the Peak District. 
#8




Rough formula for walk 'difficulty'
On 13/10/15 19:44, Terry Pinnell wrote:
The usual formula for calculating time is Naismith's rule. https://en.wikipedia.org/wiki/Naismith's_rule Thanks Craig, that will get me started. Time taken should be a good measure of 'difficulty'. But I believe Naismith came up with that in 1892? I was wondering if there have been any refinements in 123 years? Yes, see the section on Tranter's Corrections on the same page. Richard 
#9




Rough formula for walk 'difficulty'
Richard Smith wrote:
On 13/10/15 19:44, Terry Pinnell wrote: The usual formula for calculating time is Naismith's rule. https://en.wikipedia.org/wiki/Naismith's_rule Thanks Craig, that will get me started. Time taken should be a good measure of 'difficulty'. But I believe Naismith came up with that in 1892? I was wondering if there have been any refinements in 123 years? Yes, see the section on Tranter's Corrections on the same page. Thanks Richard, I should have spotted that.  Terry, East Grinstead, UK 
#10




Rough formula for walk 'difficulty'
Ted Ferenc wrote:
On Mon, 12 Oct 2015 20:53:32 +0100, Terry Pinnell wrote: I'm planning next summer's walk with my wife of the SW Coastal path, from Westward Ho! to Trevenoe. I'm in the course of making estimates of mileage and gross ascent and descent (ft), both based on my fairly careful plotting of the path and using Google Earth's elevation profile. Average mileage will be relatively short at about 9.0 as we expect to set off daily at around 10:00 and arrive at the next B&B by about 16:00, with plenty of stops en route. I'd like to come up with some sort of 'difficulty' rating, so that I can then even out the days before planning accommodation. So I'd be interested in opinions on a realistic formula to use please. Also, does anyone have actual GPS data for this section that they can share please? The few GPX and KML files I've found so far are too rough for my planning, particularly elevation. Based on the previous two sections we've walked (Exmouth to Poole Harbour) and Minehead to Westward Ho!, gross ascent is the most significant factor, so I need to get that estimated fairly accurately. When I walked sections of the path I used the book from http:// shop.southwestcoastpath.org.uk/ which I found very useful it breaks down the walk to daily sections and gives a grading for the route. The caveat is that the grading of the route may not match your own, which you will find out after a couple of days when you have walked a couple of sections, which is probably too late by then! The ascent etc. of each section is also given. I found the 'severe' grade easy, I normally walk in the Peak District. Thanks Ted. The company we book with, Encounter, supply Trailblazer books. These too are useful, but as you say it's ultimately a personal, subjective matter. Our local walking in Sussex, Kent and Surrey is not quite as appropriate a testing ground as yours! And I get the impression that next year's section of SWCP will be harder than C2C (2011), ODP (2012), SDW (2013), SWCP ExmouthPoole (2014) and SWCP MineheadWestward Ho! (2015). And we're both that bit older... Peak District... We had an enjoyable week with HF at Dovedale in 2010. Here's the rear cover of the DVD I made: I expect you'll be able to identify those photo locations? https://dl.dropboxusercontent.com/u/...010Rear1.jpg  Terry, East Grinstead, UK 
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