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The Groomer Guy - Page 2

post #31 of 36
Quote:
Originally Posted by Scott43 View Post
 

 

It's true..Diretissima at Kitzbuhel off the Steinbergkogel lift.  Untouched at noon still.  Did warp 7 down there..the graphics started peeling off my skis..smooth and fast.

 

Diretissima on Hillmap... tops out at about 25 degrees

 

post #32 of 36

Couloir Extreme at Blackcomb is nowhere as steep as that picture, other than a tricky drop in through a gap in the cornice decorated with a few rocks it is certainly not extreme. It is a great, sustained, long run with great snow. "The Couloir" is actually at Whistler off the Peak Chair and by my recollection is a lot narrower and not as steep as the picture, even untilted, but I could be wrong about that. 

post #33 of 36

always wondered how those machines groomed Challenger at Solitude - definitely the steepest groomer i've skied. and believe the steepest in Utah - might not be in the same class as Austria but a real fun run nonetheless - feel the burn after those turns

post #34 of 36
Quote:
Originally Posted by dbostedo View Post
 

 

Diretissima on Hillmap... tops out at about 25 degrees

 


Can you do that calculation for the groomed part of Laramie Bowl at Jackson Hole?  It's the skier's left portion of Laramie.

 

While it flattens out after a few turns, the top is pretty darned steep for a groomer.  I measured the top part with my inclinometer once and it came in at 38 degrees.  After seeing some of your calculations on famous runs, I'm wondering if I need to re-measure.

 

Thanks!

post #35 of 36
Quote:
Originally Posted by Bob Peters View Post
 


Can you do that calculation for the groomed part of Laramie Bowl at Jackson Hole?  It's the skier's left portion of Laramie.

 

While it flattens out after a few turns, the top is pretty darned steep for a groomer.  I measured the top part with my inclinometer once and it came in at 38 degrees.  After seeing some of your calculations on famous runs, I'm wondering if I need to re-measure.

 

Thanks!

 

There's really no calculation on my part... http:www.hillmap.com does it all for you! You just need to trace the run and click "profile". Here's the result for Laramie Bowl, along the marked trail line on the map :

 

 

 

The maximum there is a bit over 35 degrees. So 38 degrees is certainly possible depending on how the snow is sitting, and considering that the resolution on the maps probably doesn't account for short stretches or drops. (I.e. a staircase on hill map wouldn't show up as 0, 90, 0, 90, etc. I'm not sure what the smallest resolution is, but based on what I've seen of slopes I'm familiar with, I'm guessing it can resolve sections of maybe 10-15 feet of vertical.)

post #36 of 36

It's based on raw data from the US NGA (National Geospatial Agency, formerly Geodetic Survey with some spooky stuff added), available from The National Map,

http://nationalmap.gov/elevation.html

 

The resolution is mosty 1/3 arcseconds which works out to  5 to 10 meters horizontal resolution, depending on Latitude and NS vs EW.

I think all the older 1 arcsecond data has been upgraded to 1/3 in the continental US.

 

There is also higher resolution "Lidar" data starting to come on line.

 

I have done essentially the same thing that hillmap does, and it takes a lot of data handling and number crunching (simple calculations, but over and over and over again.)  I am impressed that they are able to do it in a responsive on-demand application.

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