Géniarp, arpentage et génie civil
Bathymetric surveys

Mapping what lies beneath the surface

Two service levels, from the municipal lake to the port project.

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Boats, single-beam echo sounder and RTK positioning in house

Géniarp crew in a boat under a bridge for a hydrographic survey
Season
Open water and through the ice, twelve months a year
Formats
DWG, LandXML, XYZ
Equipment
Single-beam echo sounder, RTK GPS, vessels in house; multibeam through partnership
Coverage area
Lakes, rivers and marine infrastructure across Québec
Level 1

Standard survey

  • High-precision RTK GPS positioning.
  • Single-beam echo sounder for depth measurement.
  • Motorized or remote-controlled vessels depending on water access.
  • Suited to lakes, rivers and municipal basins.
Level 2

Multibeam survey (partnership)

  • High-resolution marine mapping for port projects, delivered through a partnership with specialized firms.
  • Inspection of ports and submerged structures.
  • Dredging planning and monitoring.
  • Structural analysis of wharves and marine environmental studies.
  • Géniarp coordinates the mandate and integrates the data into your deliverables: a single point of contact.

What you receive

  • A clear read of the bottom: depths, sediment build-up, submerged structures.
  • Quantified volumes to plan dredging or track its progress.
  • Data comparable year over year to monitor how the site evolves.

What you receive

  1. 01Digital bottom model and bathymetric contours in DWG.
  2. 02XYZ point set and LandXML file for your calculations.
  3. 03Survey note: method, date, reference water level and accuracy achieved.
Where we operate

Lakes, rivers and municipalities across Québec

Sedimentation, volumetrics, dredging, seabeds and environmental monitoring.

Remote-controlled vessel running a hydrographic survey on a river
Winter surveys

Under the ice too

Winter does not stop surveys: ice drilling, fixed-point sounding and GNSS positioning deliver data comparable to summer work.

Ice drilling for a winter hydrographic survey
Hydrographic sounding carried out through the ice
Differentiator

Expertise few teams have

Specialized equipment

Echo sounders, vessels and inertial units calibrated for work on water.

Partner network

For multibeam bathymetry, we coordinate specialized firms and remain your single point of contact.

Land integration

Underwater data connects directly to your topographic surveys.
Process

How a bathymetric survey unfolds

The same path from one water body to the next: you know what is measured, when, and what you receive.

  1. Scoping the water body

    Area to cover, water access, expected depths and required accuracy determine the method and the vessel.

  2. Sounding on water or ice

    Echo sounder and RTK GNSS positioning along planned lines, with coverage verified before leaving the site.

  3. Data processing

    Water level corrections, sounding cleanup and tie-in to the land survey when both are required.

  4. Deliverables handed over

    Digital bottom model, contours and volume calculations, in formats your engineers can use.

Your questions

Bathymetric surveys: straight answers

What's the difference between single-beam and multibeam surveys?

Single-beam measures depth along sounding lines and suits lakes, rivers and municipal basins; our teams carry it out in house. Multibeam sweeps the entire bottom continuously and produces full coverage, required for port projects, dredging and inspection of submerged structures; it is delivered through a partnership with specialized firms, coordinated by Géniarp, who remains your single point of contact.

In what formats do you deliver bathymetric data?

Digital terrain model, bathymetric contours and point cloud, in DWG, LandXML or XYZ formats depending on your design or environmental monitoring needs.

What access to the body of water is required?

A boat launch for a motorized or remote-controlled vessel is sufficient in most cases. We assess access when scoping the mandate.

Can you track sedimentation over time?

Yes, by comparing repeated surveys of the same body of water, we produce volumetric tracking useful for dredging planning or municipal basin management.

28 years
Of survey experience
300+
Mandates per year, all expertise
Québec-wide
One single point of contact
Client reviews

What our clients say

“We have been working with Geniarp for years. Professional and fast service for our topographic surveys for various civil engineering and water treatment projects.”
Chopper PumpGoogle review, Civil engineering and water treatment

A water body to map?

Tell us the site, estimated depth and access: we confirm feasibility before quoting the mandate.

How urgent is it?

Reply within 24 business hours

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Next steps

Topographic surveysConnecting land and underwater data.Municipalities and infrastructureAsset documentation and water body bathymetry.Site supervisionCompliance tracking for your dredging works.
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