north-north-west wrote:Times can vary a lot, but Chapman's distances are a long way from being accurate. It's about 30km from the Scotts trackhead to Cracroft Crossing.
north-north-west wrote:If I didn't have a car parked at one end, I'd take the other route out just for the variety.
Orion wrote:north-north-west wrote:Times can vary a lot, but Chapman's distances are a long way from being accurate. It's about 30km from the Scotts trackhead to Cracroft Crossing.
Chapman's book gives a distance of 27.4km. I'm not sure how he measured it. How did you?
From Cracroft to the Huon car park is 25.4km according Chapman. Then it's another km or so to Tahune. So pretty similar distances, if you believe those numbers.
Even though time estimates are much, much fuzzier I think they are often the more useful metric. Chapman's estimate for Cracroft-Huon car park is 6.5-9.5 hours (took me about 8hrs) versus 7.0-10.5 hours for Cracroft-Scotts. Again, very similar.
north-north-west wrote:GPS tracking whilst walking. It's quite accurate. 30.2km from the carpark to the track junction
north-north-west wrote:Most of Chapman's distances are straight line map distances, with some minor allowance for jinks in the track.
Orion wrote:north-north-west wrote:GPS tracking whilst walking. It's quite accurate. 30.2km from the carpark to the track junction
Thanks for that. Do you know *how* accurate it is?
north-north-west wrote:More so than the car's odometer.
north-north-west wrote:By having the odometer checked and then comparing the two over a pre-determined route.
Aren't you quibbling a bit here? It's easy to see the inaccuracy in some of Chapman's distances by simply measuring the track on a large-scale map or even on GoogleEarth.
Orion wrote:I measured a particular day walk twice and the calculated distance differed by 2%. I expect that the spread of values would be something larger than that if I repeated it a number times.
Warin wrote:Possibly the GPS sampling is a source of this difference.
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