Fall Line — ski run classifier

Fall Line

State Ski area

Navigate

Basemap Hillshade

Basemap

Ski area data

Draw

Width (ft)

Corridor

Run

Extent

Type

Lifts none drawn

Smallest zone ac Options per zone

Glade zones Smallest glade ac

Zones

Analysis

Panes

Dark theme Units Overlay opacity

Appearance

Options

Contents

Analysis

Canopy samples LANDFIRE cells behind the numbers

Ski areas

All boundaries Every mapped area in view Selected boundary Runs Click one to use as the fall line Lifts

Expansion plan

Terrain zones Ground shaded by steepness

Run options Proposed centrelines and corridors

Wildfire and fuels

Active wildfires NIFC perimeters, 5 min refresh Fuel model LANDFIRE FBFM40 Canopy cover LANDFIRE EVC

Results

Pick a state and a ski area on the Map tab, or pan to the terrain you care about.

On Analyze, draw the fall line from the top of the pitch to the bottom, set a width, and build a corridor. On Expansion, draw an area and a lift to have the terrain segmented into zones with run options.

Ski area boundaries, runs and lifts come from OpenStreetMap, © OpenStreetMap contributors under the ODbL. Terrain is USGS 3DEP at 10 m; canopy cover, height and vegetation type are LANDFIRE at 30 m. Both are queried live, so you need to be online.

Model settings

Difficulty thresholds

Green up to % sustained Blue up to % Black up to % Sustained measured over m

Grooming

Tiller width ft Working speed mph Winch needed above % Machine rate $ /hr Groom nights per season

Clearing

Residual cover, groomer % Residual cover, glade % Felling time min/stem Crew rate $ /hr

Ready

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