walk it off, i play golf so i'm pretty sure about walking off yardages, divide that by 3 and you have your standard foot measurements... either that, or if you really have to know, measure it out with a tape measure
i actually bring a tape measure and spend about half an hour to figure out my calculations. they close the jumps for me to do my measurements this way i can get a proper distance so i can figure out the correct speed and thrust needed to clear the feature
We measure lip/take off, to the knuckle. If you build a jump with a sweet long ass steep landing you can still go 50ft on a 40ft table. Eitherway it's all relative. As long as the jump is built proportionally you can have a 20ft table and a 40ft table ski the same, just need more/less speed.
One side note would be that dif types of jumps measure dif ways. A step up could be measured in height and/or length. For a true table where the take off is actually the "front" of the feature you would measure the length of the deck. For a cheese wedge table, take off on top, you would measure from the lip to the knuckle. Some mountains measure to the landing to give the impression that the table is actually bigger.
Ask around, pace it off, of just compare it to jumps you've hit that you knew how long they were.
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take actual measurement, add 40% gives you what most parks claim.
Heloo, my name is Shane Mckonkey. I was born in Vancouver Canada, thats aboot three hours north of, ah, seattle.
Right now were here in Bella Coola Canada, and ah, weve been shut in by the weather for like three weeks eh. We havn't shot fuck all. Ooh, Soory.
We've just been sittng around, eating pasta, and spending loonies and toonies on Kokanee and peelers.
But, as soon as this weather clears, im gunna pull on my toque, eat some canadian bacon, and ah, im keen to giver.
ya i do some trig in my head after calculating the height, angle, and length of the ramp, the angle of the landing, the the hardness of the snow, the temperature of the air, and the friction of my gear.
We Must All Stop Manbearpig! - south park