Model Datasets

Below are the datasets and model attributes used in the SWReGAP Habitat Modeling effort. Models did not always use all available datasets. The most common attributes used were land cover and elevation with the hydrologic units as the constraining layer.

Description	Dataset	Examples (pdf)	Notes	Metadata	Download Data (large files)
Land Cover	SWReGAP Derived Landcover	See landcover page	The vegetation map created for SWReGAP. This layer consists of 125 land cover types including natural and disturbed classes.	metadata	SWlandcover
Elevation	NED	DEM	This is the Digital Elevation Model (DEM) for the region.	metadata	regional_dem
Slope	NED Derived	slope	Derived from regional dem. Value is (integer) slope in degrees.	metadata	slope
Aspect	NED Derived	aspect	Derived from regional DEM. (integer) Aspect (in degrees) is value and reclassed to SWReGAP categories is in value attribute table.	metadata	aspect
Distance to Perennial Water	NHD Derived	intlakes Intstream perennial lakes perennial stream springs wetlands	Each type of water is selected from the USGS NHD and a grid is created where each pixel is defined as the (integer) euclidean distance (in meters) to nearest water type. Pixels are selected if they are less than the specified distance. This layer can be used as a riparian surrogate.	metadata metadata metadata metadata metadata metadata	disttointerstill disttointerflow disttolake disttoperrflow disttosprings disttowetlands
Landform	NED Derived	landform	This dataset is a 10-class land form dataset that divides the region into areas based on slope and aspect. Valley Flats floodplains, basin floors, (alluvial, lacustrine) Toe Slopes, bottoms and swales riparian and semi-riparian, moist lower slopes and bottoms (fluvial/alluvial, colluvial, glacial) Gently sloping ridges,fans, and hills ridges and moderately dry hills and moraines (residual, glacial, other) Nearly level plateaus and terraces upland or terrace flats (residual, alluvial) Very moist steep slopes lower north facing valley and mountain sideslopes Moderately moist steep slopes northerly facing valley and mountain sideslopes Moderately dry steep slopes southerly facing valley and mountain sideslopes Very dry steep slopes upper southwest facing valley and mountain sideslopes Cool aspects cliffs, scarps, cirques over-steepened, northerly slopes Hot aspects cliffs, scarps, cirques. over-steepened, southerly slopes	metadata	landform
Soils	STATSGO Derived	clay silt sand loam boulders stone gravel cobble rocky soil depth shallow deep soils pan outcrop 15 outcrop 15-30 outcrop 30-65 outcrop 65	Derived from STATSGO. Each MUID (statsgo polygon ID) was reclassed to SWRegap soil attributes. Attribute table of coverage swregapstatsgo has the reclassification.	metadata	swregapstatsgo
Hydrologic Units			8-digit hydrologic units	metadata	usgshuc
Mountain Ranges		Mountain	Mountain range coverage created by using a roughness coefficient of the DEM.	metadata	gapmtn
Precipitation		Not Used	This dataset is generally considered to be too coarse for modeling and was not used.
Temperature		Not Used	This dataset is generally considered to be too coarse for modeling and was not used.

For additional comments or questions contact
Ken Boykin
505.646.6303