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Coverages and Grids available

Metadata describing where these are from, the map projection, horizontal and vertical datum, and any other pertinent information are provided, and should be downloaded with the datasets.

Counties of California.    Metadata:  text or html

Outlineof the Los Olivos 7.5 min Quadrangle, where Sedgwick is located.  Metadata: text or html

Sedgwick Ranch property boundary (approximate dimensions, digitized to match the DOQ).  Metadata:  text or html

  Major watersheds contained within Sedgwick Reserve (Lisque Creek on left, Figueroa Creek on right).  Metadata:  text or html

  Line coverage of streams, digitized from blue-lines on USGS topographic map.  Metadata: text or html

Geology map, hand digitized from USGS 1:24,000 geological map, 1993.  Metadata:  text or html

  Digital Orthophotoquad (DOQ) :  Aerial photos at a 1-meter resolution, corrected to show the map view of the landsurface.  Metadata: text or html


USGS 30m digital elevation model (DEM) of the Los Olivos 7.5min Quadrangle, cropped to study area.  Metadata:  text or html

Surfaces derived from the USGS DEM:

30-meter contours (close-up shown here).  Metadata:  text or html

15-meter contours (close-up shown here).  Metadata: text or html

Slope grid (degrees).  Metadata:  text or html

Shaded relief calculated from the DEM.  Metadata:  text or html

Aspect grid (0-360 degrees).  Metadata:  text or html

Curvature grid.  Metadata: text or html

Plan curvature (measured perpendicular to slope, values range from -1 to 1).  Metadata: text or html

Profile curvature (measured parallel to slope).  Metadata:  text or html

Terrain roughness:  standard deviation of elevation values calculated per pixel in a moving circle, radius 300m.  Metadata:  text or html

Flow accumulation:  Total number of upslope cells that would theoretically contribute water to each pixel if water were poured on the surface. Metadata: text or html

Flow direction:  Direction water would flow out of each pixel, based on the elevations of the 8 surrounding cells.  Metadata:  text or html

Upstream flow path length:  number of cells from the nearest ridgeline through which water would theoretically flow to reach each cell.  Metadata:  text or html

Compound Topographic Index (CTI):  a wetness index:  ln (( upslope contributing area per unit width orthogonal to the flow direction) / (tan(slope angle) ) .  Metadata:  text or html