Bathymetry and Acoustic Backscatter of Crater Lake, Oregon from Field Activity: S-1-00-OR

Online link https://geo-nsdi.er.usgs.gov/metadata/digital-data/72/metadata.faq.html
Description These data include high-resolution bathymetry and calibrated acoustic backscatter in XYZ ASCII and ArcInfo GRID format generated from the 2000 multibeam sonar survey of Crater Lake, Oregon.
Originators Gardner, James V. and Dartnell, Peter

Related topics

States or counties

Overview of attributes

Coordinates in the XYZ ASCII file are given in decimal degrees.
Bathymetry is given in meters.  Backscatter is an arbitrary scale ranging from 26 to 254.
Sample of bathymetry XYZ ASCII file
>Longitude, Latitude, Elevation
>-122.11496,42.96909,1514.068
>-122.11494,42.96909,1514.674
>-122.11492,42.96909,1515.272
>-122.11490,42.96909,1515.862
>-122.11487,42.96909,1516.448
>-122.11485,42.96909,1517.026
>-122.11483,42.96909,1517.591
>-122.11481,42.96909,1518.141
>-122.11479,42.96909,1518.691
Sample of Backscatter XYZ ASCII file
> Longitude, Latitude, DN Value
>-122.08681,42.95930,183.798
>-122.08679,42.95930,181.868
>-122.08677,42.95930,186.463
>-122.08675,42.95930,188.191
>-122.08673,42.95930,191.080
>-122.08670,42.95930,190.712
>-122.08668,42.95930,187.086
>-122.08666,42.95930,183.662
>-122.08664,42.95930,183.558

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Overview of attributes

BATHY is an ArcInfo GRID with the following attributes:
>Data Type: Floating
BOUNDARY (UTM meters)
>Xmin =  568119.572
>Xmax =  577473.572
>Ymin = 4750592.815
>Ymax = 4758866.815
STATISTICS (grid cell values, elevation in meters)
>Minimum Value =      1289.1
>Maximum Value =      1881.0
>Mean          =      1529.6
>Standard Deviation =  180.0
BACKSTR is an ArcInfo grid with the following attributes:
>Data Type: Floating
BOUNDARY (UTM meters)
>Xmin =  568094.347
>Xmax =  577512.347
>Ymin = 4750342.202
>Ymax = 4758964.202
STATISTICS (grid cell values, digital number)
>Minimum Value =       26.228
>Maximum Value =      253.965
>Mean          =      203.641
>Standard Deviation =  11.623

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