CSV export
Since the Surveyor is a multi-beam echo sounder, each time we emit a sonar pulse, we receive multiple signals and combine them to get multiple beams. Each ping consists of multiple “detections” and each detection is a row in the CSV.
Some data is per-detection, and some is per-ping.
The following columns are presented in CSV export:
latitude
detection's geodetic latitude in decimal degrees north of equator (or negative south)
longitude
detection's geodetic longitude in decimal degrees east of prime meridian (or negative west)
altitude (m)
height of detected point above sensor. Will be negative.
northing (local m)
detection's Cartesian position in meters north. Relative to an arbitrary origin.
easting (local m)
detection's Cartesian position in meters east. Relative to an arbitrary origin.
ping number
sequence number of the ping which produced this data. Each ping has multiple detections, and thus multiple rows in the CSV.
elapsed (s)
time the ping was sent, in seconds since the session started
datetime
time the ping was sent, in UTC
altitude (m above MSL)
Altitude of the point relative to Mean Sea Level
northing (UTM m)
detection's georeferenced Cartesian position
easting (UTM m)
detection's georeferenced Cartesion position
coordinate projection
Which UTM zone the georeferenced coordinates are in
Positions are represented as Local Cartesian Coordinates (x,y,z). x=north, y=east, z=down.
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