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Pond bathymetry and slope survey, Richmond Hill

Pond bathymetry in Richmond Hill: slopes shot with a Spherefix base and rover, then the rover’s NMEA output positioned the sonar on the water.

Elgin Mills, Richmond HillLocation
SP30 base and rover, sonarEquipment
Slopes and bottom on one GNSSResultMethod, not a measured accuracy.
Inflatable survey boat with sonar and a Spherefix GNSS rover on its mast, at the edge of a stormwater pond

The objective

Survey a pond’s side slopes and its bottom, so both join into one surface.

Setup

The Spherefix base and rover localized the site, then shot all the slopes around the pond. For the water, the rover went on the boat, and its NMEA output fed the sonar, so every depth reading carried a Spherefix position. It worked without a hitch.

  • SP30
    Base
  • SP30
    Rover, then on the boat
  • NMEA output
    Position feed to the sonar
  • Localize
    Site calibration
  • Sonar
    Depths

What it produced

One surface from the top of bank to the pond floor, with the land and the water positioned by the same Spherefix GNSS.

Spherefix rover and tablet shooting the slope beside a road, Elgin Mills
Shooting the slopes around the pond.

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