Data were collected from 11 September 2014 to 21 September 2016.

Sidescan sonar imagery (GeoTIFF) is available for qualitative purposes. The sidescan range violated the 1:10 depth: range ratio rule-of-thumb, as range was to 50x water depth.

Bathymetric point data from Singlebeam Echosounder (ArcGIS Shapefile and CSV).

Bottom features including Maximum SV, First echo, second echo, kurtosis, skew, rise, hardness, and roughness (see EchoView support for description of these features)

• Caution should be used when interpreting all bottom features other than depth(bathymetric data are acceptable). Poor weather and resulting heave affected the signal for some survey days. In general, the singlebeam data in the southwest portion of the bay is reliable. The use of the features to automate a habitat classification is not suggested.

DEM Creation

• Empirical Bayesian kriging

  • Output cell size 50

  • Logempirical transformation

  • Exponential semivariogram

  • 500 points in each local model

  • Local model overlap 3

  • 50 simulated semivariograms

  • Standard circular search pattern

    • Radius of 100 m

    • Maximum neighbors = 500

    • Minimum neighbors = 100

    • Angle 45

    • Sector Type – 4

    • Survey planning in Hypack

Disclaimer: This product is for informational purposes only and may not be suitable for legal, engineering, or surveying purposes. It does not represent an official survey and represents only the approximate relative location of features and boundaries. Mapping may not necessarily reflect on-the-ground conditions. This product and those involved in its production make no claims as to the accuracy or reliability of the data, and neither assumes, nor will accept liability for their use.

Data were collected from 11 September 2014 to 21 September 2016.

Sidescan sonar imagery (GeoTIFF) is available for qualitative purposes. The sidescan range violated the 1:10 depth: range ratio rule-of-thumb, as range was to 50x water depth.

Bathymetric point data from Singlebeam Echosounder (ArcGIS Shapefile and CSV).

Bottom features including Maximum SV, First echo, second echo, kurtosis, skew, rise, hardness, and roughness (see EchoView support for description of these features)

• Caution should be used when interpreting all bottom features other than depth(bathymetric data are acceptable). Poor weather and resulting heave affected the signal for some survey days. In general, the singlebeam data in the southwest portion of the bay is reliable. The use of the features to automate a habitat classification is not suggested.

DEM Creation

• Empirical Bayesian kriging

  • Output cell size 50

  • Logempirical transformation

  • Exponential semivariogram

  • 500 points in each local model

  • Local model overlap 3

  • 50 simulated semivariograms

  • Standard circular search pattern

    • Radius of 100 m

    • Maximum neighbors = 500

    • Minimum neighbors = 100

    • Angle 45

    • Sector Type – 4

    • Survey planning in Hypack

Disclaimer: This product is for informational purposes only and may not be suitable for legal, engineering, or surveying purposes. It does not represent an official survey and represents only the approximate relative location of features and boundaries. Mapping may not necessarily reflect on-the-ground conditions. This product and those involved in its production make no claims as to the accuracy or reliability of the data, and neither assumes, nor will accept liability for their use.