BATHYMETRIC Surveys
Precise Depth Measurement & Seabed Mapping
Ollerhead & Associates provides highly accurate hydrographic surveys throughout the Northwest Territories and Nunavut. Our extensive experience and advanced technology allow us to conduct and manage large-scale projects across vast geographical areas.
We use advance sonar systems, including single and dual-frequency single-beam echo sounders, multibeam echo sounders, side-scan sonar, and sub-bottom profilers, to provide precise bathymetric data for various water environments, such as rivers and coastlines. Our surveys deliver both raw and processed data, ensuring complete flexibility for your needs.
SINGLE-BEAM BATHYMETRIC Surveys
Our Hydrographic Surveying Capabilities Include:
Single-beam surveys provide an efficient and cost-effective solution for measuring water depth with high accuracy. We use dual-frequency echo sounders for data acquisition, along with industry-leading software to deliver comprehensive, accurate final products.
Advantages:
- Quick setup and data collection
- Fast product turnaround times
- Cost-effective
- Dual-frequency technology enhances
accuracy and redundancy
Applications:
- Bathymetric Mapping
- Hard and Soft Bottom Detection
- Cross Section Plotting
- Tailing Pond Containment Reports
- Navigational Chart Production
topographic survey of liard river crossing
Red color indicates 0.00 to 1.00 meters water depth
Explains symbols and colors to interpret map information accurately
Blue lines are major contours shown on plan
Brown lines are minor contours shown on plan
Color gradients show changing water depth from shallow shores to deep waters
Yellow color indicates 2.00 to 3.00 meters water depth
Orange color indicates 1.00 to 2.00 meters water depth
Green color indicates 3.00 to 4.00 meters water depth
Cyan color indicates 4.00 to 5.00 meters water depth
Royal Blue color indicates 5.00 to 6.00 meters water depth
Navy Blue color indicates 6.00 to 7.00 meters water depth
Purple color indicates 7.00 to 8.37 meters water depth
stations 0+000 to 1+000
ARROW: graphic symbol showing map orientation, indicating the north direction
All brown lines are Minor & all blue lines are Major Contours
All brown lines are Minor & all blue lines are Major Contours
Red color indicates 0.00 to 1.00 meters water depth
Orange color indicates 1.00 to 2.00 meters water depth
Yellow color indicates 2.00 to 3.00 meters water depth
Green color indicates 3.00 to 4.00 meters water depth
Cyan color indicates 4.00 to 5.00 meters water depth
Green color indicates 3.00 to 4.00 meters water depth
Orange color indicates 1.00 to 2.00 meters water depth
Red color indicates 0.00 to 1.00 meters water depth
Royal Blue color indicates 5.00 to 6.00 meters water depth
Chainage and station indicate measured linear distance along the map alignment
stations 1+100 to 2+100
Royal Blue color indicates 5.00 to 6.00 meters water depth
Navy Blue color indicates 6.00 to 7.00 meters water depth
Royal Blue color indicates 5.00 to 6.00 meters water depth
Navy Blue color indicates 6.00 to 7.00 meters water depth
stations 2+200 to 3+100
Navy Blue color indicates 6.00 to 7.00 meters water depth
Purple color indicates 7.00 to 8.37 meters water depth
overview of liard river crossing - stations 0+000 to 3+100
Scale
SINGLE BEAM BATHYMETRIC Survey Video
MULTIBEAM BATHYMETRIC Surveys
Multibeam surveys provide a richer, more detailed view of underwater topography. By using multibeam echo sounders, we offer 100% bottom coverage, making it ideal for precise infrastructure planning and analysis.
- Underwater Pipe Location
- Bride Buttress Mapping Analysis
- Detailed Floor Mapping – Ice Scouring
- High Resolution Wharf & Marina Mapping
- Pre-Dredging, Post-Dredging Volume Surveys & Cross-Sections
- Full bottom coverage for comprehensive data collection
- Ability to survey a wide swath
- Detailed data allows for accurate subsea mapping
side-scan sonar
Side-scan sonar provides a highly detailed image of the seafloor. This technology is ideal for identifying and mapping underwater features such as wrecks, pipelines, and other structures.
sub-bottom profiling
Sub-bottom profiling allows us to visualize the sediment layers beneath the seafloor, providing valuable insight into subsurface conditions. This data is essential for site assessments in offshore construction and environmental surveys for dredging and mining projects.
