• Surrey Office

    01483 429385
  • London Office

    020 81111 385
  • Brighton Office

    01273 027327
  • Hampshire Office

    0238 2023881
"Specialising in measured building, land & topographical surveys"

Hydrographic Surveys

Hydrographic Lake Surveying and Surveys in London, Sussex and Surrey

Cadmap Limited offer Hydrographic surveys for detailing rivers, lakes, reservoirs, harbours, marinas and ponds.

We operate specialised equipment and software to capture underwater data, a remote controlled catamaran for sturdiness while in the water, a SonarMite Hydrographic Echo Sounder that is synced with a Leica GPS device fixed to the boat to give real-time data collation and can record survey points every second.  

Using an RC Boat also eradicates a person having to get into the water or working on water. 

  • Contours
  • Cross Sections
  • Long Sections
  • Volume Surveys
  • 3D Mapping
  • Lake Surveys
  • River Surveys

What is a Hydrographic Survey?

A hydrographic survey is a type of survey conducted in bodies of water, such as oceans, lakes, rivers, and harbors, to map and study the physical features, contours, and conditions of the water body and its submerged environment. The primary purpose of a hydrographic survey is to collect accurate and detailed information about the depth, shape, and composition of the underwater terrain.

Hydrographic surveys are conducted using specialized equipment and techniques to measure the bathymetry (underwater topography), water depths, currents, tides, and other related data. The collected information is used to create nautical charts, maps, and models that are essential for safe navigation, maritime operations, coastal engineering, environmental management, and various other marine-related activities.

The process of conducting a hydrographic survey typically involves the following steps:

  1. Data Collection: Surveyors use specialized surveying instruments, such as multibeam echo sounders, single-beam echo sounders, side-scan sonar, and sub-bottom profilers, to collect depth measurements and other relevant data. These instruments emit sound waves or pulses that travel through the water column and bounce back from the seafloor, allowing for the calculation of water depths and the detection of underwater features.

  2. Positioning and Georeferencing: Precise positioning is critical in hydrographic surveys london. Global Navigation Satellite Systems (GNSS) and other positioning techniques, such as differential GPS (DGPS), are used to accurately determine the survey vessel's position and align the collected data with the Earth's coordinate system.

  3. Data Processing and Analysis: The collected survey data is processed and analyzed using specialized software to filter out noise, eliminate errors, and generate accurate bathymetric charts, contour maps, and other outputs. Advanced algorithms are applied to handle data interpolation, quality control, and visualization.

  4. Charting and Reporting: The processed Cadmap survey data is used to update nautical charts and produce reports that provide important information for navigational safety, maritime infrastructure planning, environmental assessments, and resource management.

Hydrographic surveys are crucial for maritime navigation, port and harbor management, dredging operations, offshore installations, marine construction, underwater cable and pipeline routing, coastal zone management, and environmental monitoring. They help ensure the safety of maritime transportation, aid in the planning and design of marine structures, and contribute to the sustainable management of marine ecosystems.

If you require a Hydrographic Survey please contact Cadmap - info@cadmap.co.uk

If you require a hydrographic survey please contact us.