Torrey Pines Beach Mapped Sand Elevations
datasetposted on 21.12.2019 by Bonnie C. Ludka, Robert T. Guza, William C. O'Reilly, Mark A. Merrifield, Reinhold E. Flick, Spicer Bak, Tyler J. Hesser, Randy L. Bucciarelli, Corey Olfe, Brian Woodward, William Boyd, Kent Smith, Michele Okihiro, Rob Grenzeback, Lucian Perry, Greg Boyd
Datasets usually provide raw data for analysis. This raw data often comes in spreadsheet form, but can be any collection of data, on which analysis can be performed.
Mapped sand elevations at Torrey Pines Beach. Elevation maps are created on the same grid as the binned observations, but are smoothed and fill in small data gaps. For each survey, bins containing less than 3 data points are considered unsampled and are discarded. Map boundaries are defined as grid points that are regularly sampled during unnourished quarterly full surveys (must be populated at least 25\% of the time as the most frequently full surveyed grid point, during times without nourishment). Grid points with an unnourished average depth greater than 8m are not mapped because speed of sound errors due to stratification may contaminate jet ski sonar measurements. When the estimated interpolation (or extrapolation) error is large (NMSE>0.2), the map bin elevation is considered missing and filled with the value -99999.