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

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: James V. Gardner

Originator: Peter Dartnell

Publication_Date: 2001

Title:

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

Geospatial_Data_Presentation_Form: XYZ ASCII

Larger_Work_Citation:

Citation_Information:

Originator: James V. Gardner

Originator: Peter Dartnell

Publication_Date: 2001

Title:

2000 Multibeam Sonar Survey of Crater Lake, Oregon: Data, GIS, Images, and Movies

Series_Information:

Series_Name: U.S. Geological Survey Digital Data Series

Issue_Identification: 72

Online_Linkage: <http://pubs.usgs.gov/dds/dds-72/>

Description:

Abstract:

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.

Purpose:

These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) or other software to display bathymetry and backscatter data of Crater Lake, Oregon.

Supplemental_Information:

Information for USGS Coastal and Marine Geology related activities are online at <http://walrus.wr.usgs.gov/infobank/s/s100or/html/s-1-00-or.meta.html>

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20000728

Ending_Date: 20000803

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.16555054

East_Bounding_Coordinate: -122.04983558

North_Bounding_Coordinate: 42.97851439

South_Bounding_Coordinate: 42.90490823

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: Marine Geology

Theme_Keyword: Multibeam

Theme_Keyword: Bathymetry

Theme_Keyword: Backscatter

Theme_Keyword: Water Depth

Theme_Keyword: Lakefloor Topography

Theme_Keyword: Volcanics

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories

Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Oregon

Place_Keyword: OR

Place_Keyword: Crater Lake

Place_Keyword: USA

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0

Place_Keyword: 41035 = Klamath

Access_Constraints: None

Use_Constraints:

These data not intended for navigational purposes. Please recognize the U.S. Geological Survey (USGS) as the source of this information. USGS-authored or produced data and information are in the public domain. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user. Neither the U.S. Government nor any agency thereof, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: James V. Gardner

Contact_Organization:

United States Geological Survey (USGS) Coastal and Marine Geology (CMG)

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: USGS, MailStop 999, 345 Middlefield Road

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025-3561

Country: USA

Contact_Voice_Telephone: (650) 329-5469

Contact_Facsimile_Telephone: (650) 329-5411

Contact_Electronic_Mail_Address: jvgardner@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

<http://pubs.usgs.gov/dds/dds-72/site/images/cl-persp.img/cl-map.gif>

Browse_Graphic_File_Description:

Map view of Crater Lake, Oregon. Colored region is the lake floor whereas the gray region is the surrounding land. The distance across the width if the lake is approximately 9 kilometers (5.6 miles). The reds and yellows show the shallower depths of the lake, whereas the greens and blues show the deeper depths.

Browse_Graphic_File_Type: GIF

Data_Quality_Information:

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: 0.5 meters

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: 0.05 percent of the water depth

Lineage:

Process_Step:

Process_Description:

The bathymetry and backscatter data were collected along a continuous swath perpendicular to the direction of the ship using a Kongsberg Simrad EM1002 multibeam sonar system. The data are cleaned of bad navigation and depth readings. The depth readings are gridded into a common grid. The gridded data are converted to an XYZ ASCII format file (Longitude, Latitude, Attribute).

Process_Date: 20000803

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: James V. Gardner

Contact_Organization:

United States Geological Survey (USGS) Coastal and Marine Geology (CMG)

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: USGS, MailStop 999, 345 Middlefield Road

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025-3561

Country: USA

Contact_Voice_Telephone: (650) 329-5469

Contact_Facsimile_Telephone: (650) 329-5411

Contact_Electronic_Mail_Address: jvgardner@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

Point_and_Vector_Object_Count: 13,246,103

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 4137

Column_Count: 4677

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 10

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -123.00000

Latitude_of_Projection_Origin: 0.00000

False_Easting: 0.00

False_Northing: 0.00

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 2.0

Ordinate_Resolution: 2.0

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: WGS84

Ellipsoid_Name: WGS84

Semi-major_Axis: 6378137.00 meters

Denominator_of_Flattening_Ratio: 0.003352811

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

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

Entity_and_Attribute_Detail_Citation: none

Overview_Description:

Entity_and_Attribute_Overview:

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

Entity_and_Attribute_Detail_Citation: none

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

United States Geological Survey (USGS) Information Services

Contact_Address:

Address_Type: mailing and physical address

Address: Box 25286

City: Denver

State_or_Province: CO

Postal_Code: 80225

Country: USA

Contact_Voice_Telephone: (888)ASK-USGS

Resource_Description: S-00-OR data set

Distribution_Liability:

These data not intended for navigational purposes. Please recognize the U.S. Geological Survey (USGS) as the source of this information. USGS-authored or produced data and information are in the public domain. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user. Neither the U.S. Government nor any agency thereof, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: CSV (ASCII)

Format_Specification:

The data are provided in comma-separated value (.csv) ASCII XYZ (longitude, latitude, value) format.

Format_Information_Content:

XYZ points with the Z coordinate indicating bathymetry (file bt_xyz.zip) or backscatter (file bk_xyz.zip).

File_Decompression_Technique: unzip

Transfer_Size: 78 megabytes

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://pubs.usgs.gov/dds/dds-72/data/bt_xyz.zip>

Network_Resource_Name: <http://pubs.usgs.gov/dds/dds-72/data/bk_xyz.zip>

Digital_Form:

Digital_Transfer_Information:

Format_Name: ArcInfo GRID

Format_Version_Number: 8.0

Format_Information_Content: bathymetry (grid bathy) and backscatter (grid backstr)

Transfer_Size: 400 megabytes

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Format: ISO9660

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20010425

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Pete Dartnell

Contact_Organization:

United States Geological Survey (USGS) Coastal and Marine Geology (CMG)

Contact_Position: Physical Scientist

Contact_Address:

Address_Type: mailing and physical address

Address: USGS, MailStop 999, 345 Middlefield Road

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025-3561

Country: USA

Contact_Voice_Telephone: (650) 329-5460

Contact_Facsimile_Telephone: (650) 329-5411

Contact_Electronic_Mail_Address: pdartnell@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: universal time