Originally Posted by Powdr
I use a GIS program called Global Mapper (not freeware) to get my results. It uses DOQ overlays, which are far more detailed (but B&W). Here is an example of a line @ Copper:
I then calculate the slope the same way as in Google Earth: Vertical/Length and then the inverse sin (in this case it comes out to 22.7 degrees). I also measure the area (acreage) of a ski area by using the Area Tool in this program. The lies that some ski areas tell.....
Nice app. I'm an ERMapper kinda guy myself. There's an amazing amount of free or nearly free data out there on the interweb: DEMs, DOQs, DRGs of 24k topos, and now the output of that shuttle mission that generated a 30-meter elevation model of the world about 5 years ago.
I used to work with a ski area designer
in your neck of the woods orthorectifying aerial photos against USGS DRG topos and DEM data (nurse, come quick, I think someone is orthorectifying over here!) for Crystal Mountain, Snowbasin, Snowbird, Alta, Kicking Horse, and a few other places. Most of the work was for new-lift planning purposes (Mineral Basin at Snowbird, for example), and although the mapping was fun, the best part was the "field work" during the winter....