Minimum Travel Time Fire Spread (MTT) GeoTIFFs from IFTDSS
The GeoTIFF for Minimum Travel Time Fire Spread (MTT) runs in IFTDSS contain the bands outlined in the table below:
| Band Number |
Output |
Description |
Map Studio - Units | Report - Units | Download - Units |
|---|---|---|---|---|---|
| 1 | MTT Arrival Time GridA, B | The time required for fire to travel from its ignition source to a particular cell. See the Arrival Time topic for more details. | burn period | burn period | minutes |
| 2 | MTT Rate of SpreadA, B | Spread rate of the fire as it encountered each cell along the minimum travel time path. See the Rate of Spread topic for more details. | chains/hr | chains/hr | meters/min |
| 3 | MTT Fireline IntensityA, B | Fireline intensity of each cell burned by the fire as it follows the minimum travel time path. See the Fireline Intensity topic for more details. | BTU/ft-sec | BTU/ft-sec | kW/m |
| 4 | MTT Ignition Grid | The raster interpretation of the ignition and barrier vectors used by the MTT model. See the MTT Ignitions topic for more details. | unitless | N/A | unitless |
| 5 | Midflame Wind Speed C | Wind velocity at the midflame height. Calculated using wind adjustment factors based on stand height and canopy cover and the Wind Speed. | mph | N/A | mph |
| 6 | 1 Hr Fuel Moisture A | Moisture content of 1-hour fuel (dead woody fuel 0 to ¼ inch or 0 to 6.4 mm in diameter) is the mass of water within the fuel particle expressed as a percentage of the fuel particle’s oven-dry mass. | percent | N/A | proportion |
| 7 | 10 Hr Fuel Moisture A | Moisture content of 10-hour fuel (dead woody fuel ¼ to 1 inch or 0.6 to 2.5 cm in diameter) is the mass of water within the fuel particle expressed as a percentage of the fuel particle’s oven-dry mass. | percent | N/A | proportion |
| 8 | 100 Hr Fuel Moisture A | Moisture content of 100-hour fuel (dead woody fuel 1 to 3 inches or 2.5 to 7.6 cm in diameter) is the mass of water within the fuel particle expressed as a percentage of the fuel particle’s oven-dry mass. | percent | N/A | proportion |
| 9 | Wind Direction | Wind direction is the direction from which the wind is blowing, specified in degrees increasing clockwise from north (which is zero degrees), Uphill or Downhill. Measured 20 feet (6 m) above the top of the tree or shrub canopy, or above the ground if canopy is absent. | N/A | N/A | degrees |
| 10 | Wind Speed | Wind velocity measured 20 feet (6 m) above the top of the tree or shrub canopy, or above the ground if canopy is absent. | N/A | N/A | mph |
A GeoTIFF values for non-burnable pixels are -1.
B GeoTIFF values for burnable but not burned pixels are 0.
C GeoTIFF values for non-burnable pixels are 0.