Bathymetric Survey
We measure your water body’s depths to navigation-grade accuracy: a survey boat fitted with single- or multibeam sonar tied to GNSS-RTK positioning runs a regular line pattern across the project area, with tidal observation and correction tying every reading to the adopted datum. Processing yields a seabed contour map, XYZ points, and dredging or siltation volumes when two surveys are compared — a safe basis for designing ports, bridges, and marine structures and for monitoring bed change.
- Turnaround
- 5–10 working days
- Deliverables
- 4
- Coverage
- 2 cities
By the numbers
- 5–10 days
- Turnaround
- Navigation-grade
- Depth accuracy
- Single/Multibeam
- Sonar method
The problem we solve
Designing ports, bridges, and water structures without an accurate picture of the bed puts the project at risk. A bathymetric survey gives you a precise depth map for safe decisions.
Who needs this service
Port authorities, marine-works consultants, bridge and water-structure contractors, and dredging companies.
When you need this service
- Before designing or dredging ports and channels
- To compute dredging and siltation volumes
- To monitor bed changes over time
How we execute
- 1
Rig the boat and sonar and tie it to GNSS positioning
- 2
Run depth survey lines at appropriate density
- 3
Apply tide/current corrections and process the data
- 4
Produce the depth map and run QA
What we need from you
- Boundary of the water area to survey
- A vertical datum / reference level
- Access and navigation permits
What you receive
- Accurate depth (contour) map
- XYZ point data
- Dredging volume calculations
- Bathymetric survey report
Equipment & methodology
We equip this service from our owned fleet of 90 instruments:
Sonar & hydrographic
Single-beam echo sounders and survey vessels for bathymetric and hydrographic surveys.
We own and operate our field fleet — our site shots carry the “From our field work” chip, alongside class-reference photos.
Available in
Frequently asked
Single-beam vs multibeam — which?+
Single-beam is economical for regular areas; multibeam gives full-bottom coverage for critical zones and ports — we pick what fits your project.
Do you correct for tides?+
Yes, we apply tide and current corrections to tie depths to the reference datum accurately.
How much does a bathymetric survey cost?+
It depends on scope: survey area, required line density, sonar type (single- or multibeam), and site conditions such as currents, navigation, and permits. Periodic siltation-monitoring surveys get preferential per-mission pricing. Tell us the area boundary and purpose and we will return a detailed quote.
Can you compute pre- and post-dredging volumes?+
Yes — we survey before dredging and after it, then compute the actual removed volume by comparing the two bed models, a fair and documented basis for settling dredging statements between owner and contractor.
What standards do you work to?+
We follow an IHO-aligned hydrographic methodology for line density, depth and positional accuracy, and tide handling, and the survey report documents the instruments used, the adopted datum, and the quality criteria achieved for each area.
Our crews on real projects
Real photographs from GeoGiza's field projects across Egypt and the region.
Browse by capability, sector, or instrument
Our guarantees to you
We take the risk off your project — so you can commit with confidence.
Accuracy guarantee
If a deliverable misses the agreed accuracy spec, we re-survey and correct it at no extra cost.
On-time commitment
We agree the delivery schedule up front and keep you updated at every stage until it's met.
Full confidentiality
Every engagement is covered by an NDA. Your data and drawings are never shared.
You own the files
You receive the editable source files (DWG, DXF and more) — full ownership, no lock-in.