Entity_Type:
Entity_Type_Label: 2013-003-FA_BackscatterTracklines
Entity_Type_Definition: Trackline for swath backscatter sonar system
Entity_Type_Definition_Source: USGS
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features
Attribute:
Attribute_Label: LineName
Attribute_Definition:
Survey line/file name; generally in the format l###f@-CH12 where ### is the name of the trackline along which swath bathymetric data was collected, @ is the file iteration (indicates the survey line was split into multiple files during acquisition) and CH12 indicated that channels 1 and 2 were imported. For example: survey line 179 was interrupted 30 minutes into the line, the ship circled around to the location where surveying was paused; there are 2 tracklines for line 179 "l179f1-CH12" and "l179f2-CH12".
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: String up to 18 characters
Attribute:
Attribute_Label: Yr_JD_str
Attribute_Definition:
Year and Julian day of the start of data collection for a specific survey line where Julian day is the integer number (although recorded here in text string format) representing the interval of time in days since January 1 of the year of collection. For example: the Yr_JD_str field for l100f1_sxp is "2013-154"
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: 8 character string
Attribute:
Attribute_Label: JD_UTC_str
Attribute_Definition:
Julian day and time in UTC of the start of data collection for a specific survey line where Julian day is the integer number representing the interval of time in days since January 1 of the year of collection and UTC time is time represented in the format "hh:mm:ss". For example: the JD_UTC_str field for l100f1_sxp is "154:05:07:43"
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: 12 character string
Attribute:
Attribute_Label: Yr_JD_end
Attribute_Definition:
Year and Julian day of the end of data collection for a specific survey line where Julian day is the integer number (although recorded here in text string format) representing the interval of time in days since January 1 of the year of collection. For example: the Yr_JD_end field for l100f1_sxp is "2013-154"
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: 8 character string
Attribute:
Attribute_Label: JD_UTC_end
Attribute_Definition:
Julian day and time in UTC of the end of data collection for a specific survey line where Julian day is the integer number representing the interval of time in days since January 1 of the year of collection and UTC time is time represented in the format "hh:mm:ss". For example: the JD_UTC_end field for l100f1_sxp is "154:06:07:22"
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: 12 character string
Attribute:
Attribute_Label: SurveyID
Attribute_Definition:
WHCMSC field activity identifier in the new style (e.g. "2013-003-FA" where 2013 is the survey year, 003 is survey number of that year, and FA is Field Activity); Note the old style of this would be represented as "13003"
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: 11 character string
Attribute:
Attribute_Label: VehicleID
Attribute_Definition: Name of the survey vessel used for data collection
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: 21 character string
Attribute:
Attribute_Label: DeviceID
Attribute_Definition: Name of the sonar device used to collect swath backscatter data
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: 16 character string
Attribute:
Attribute_Label: Length_km
Attribute_Definition:
Length of the swath backscatter survey line in kilometers (UTM Zone 19N, WGS84)
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.67
Range_Domain_Maximum: 22.30