# properties.survey_id.comments
This is the alpha numeric identifier for the survey.

# properties.country.comments
Aggregated list of Countries in which the survey took place.

# properties.state.comments
Aggregated list of States in which the survey took place.

# properties.onshore_offshore.comments
Survey was conducted onshore, offshore, or both. Valid values are (On, Off, OnOff).

# properties.survey_type.comments
The type of survey (eg, air, land, marine, satellite).

# properties.survey_detail.comments
A term to describe the level of detail of the geophysical survey (eg, detailed, regional, semi-detailed).

# properties.measurement_type.comments
Aggregated list of terms used to describe the type of measurements collected in a survey (eg, electromagnetic, magnetic, gravity, radiometric).

# properties.owner.comments
Aggregated list of the owners of the data. May be the same as the client.

# properties.operator.comments
Aggregated list of the survey organisations that performed the survey.

# properties.contractor.comments
Aggregated list of the survey organisations that performed the survey.

# properties.processor.comments
Aggregated list of the organisations or the persons that performed the data processing.

# properties.platform_type.comments
Aggregated list of the types of vehicles used.

# properties.platform_name.comments
Aggregated list of the survey platforms or vessel names (eg, Cessna Caravan, Piper Cherokee).

# properties.min_longitude_wgs84.comments
Eastern boundary longitude of this survey.

# properties.max_longitude_wgs84.comments
Western boundary longitude of this survey.

# properties.min_latitude_wgs84.comments
Northern boundary latitude of this survey.

# properties.max_latitude_wgs84.comments
Southern boundary latitude of this survey.

# properties.min_line_spacing_meters.comments
The minimum spacing between lines, in meters, if applicable.

# properties.max_line_spacing_meters.comments
The maximum spacing between lines, in meters, if applicable.

# properties.tie_spacing_meters.comments
If applicable, the distance in metres between tie lines of the survey.

# properties.line_kilometres.comments
If applicable, the number of data acquisition kilometres flown or sailed in the survey (ie, not including tie lines).

# properties.tie_kilometres.comments
If applicable, the number of tie line kilometres flown or sailed in the survey.

# properties.total_kilometres.comments
For surveys conducted along lines, the total number of line kilometres, including tie lines.

# properties.line_azimuth.comments
If applicable, the azimuth of data acquisition lines in the survey (ie, not tie lines).

# properties.tie_azimuth.comments
If applicable, the azimuth of tie lines in the survey.

# properties.polygon_extent_wgs84_wkt.comments
Polygon outline of the spatial extent of the geophysical survey in WGS84 Datum.

# properties.min_station_spacing_metres.comments
The minimum spacing between gravity stations, in meters.

# properties.max_station_spacing_metres.comments
The maximum spacing between gravity stations, in meters.

# properties.polygon_type.comments
Original Polygon or Calculated Bbox. If the data has bounding coordinates but no polygon data, it will calculate a Bbox to use as the geometric representation.