Nexus Spatial Solutions

02/07/2021

Maps interacts in several ways. Generating terrain maps from Digital Elevation Models is a vital information for topography, landforms and height/elevation in research and study.

29/06/2021

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29/06/2021

Study Area maps comes in various forms relating to virtual modelling of reality maps. It denotes accuracy, scaling, design thinking process, creativity, modelling, color coding etc

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08/06/2020

Bathymetry

What is Bathymetric Survey?

Bathymetry is the study of the bed (floor) of a waterbody, involving mapping of features on charts to provide information on water depth. Bathymetric charts are typically produced to aid navigation and inform dredging activities, for example during maintenance of navigational channels.

Bathymetry traditionally uses an echosounder attached to a survey boat. As the boat drives across the survey area, the echosounder generates electrical signals that are then converted to sound waves by a transducer under water. The sound waves bounce off of the underwater features and this echo is picked up by the echosounder which then calculates the distance to the feature. The system uses high accuracy GNSS (GPS) system to then link each distance measurement to a specific depth on a map.

Digital Terrain Models (Digital Elevation Models) can be produced through combining bathymetry with photogrammetry or LIDAR data. These techniques are traditionally used on land to measure elevations but do not work under water. By combining the three techniques, underwater features, intertidal features and land-based features can be stitched together into one seamless model/map.

Bathymetric surveys are an essential tool to ensure safe navigation and effective dredging and maintenance of navigable waterbodies. They provide accurate measurement of depths of any waterbody.

# How to carry out a bathymetric survey #.

08/08/2019

Charting of CAD survey on high resolution aerial photographs represents proper geo-reference on ground...

19/03/2019

3D Elevation Model and Contour Map of a portion of ocean floor using Points_to_contour_to_DEM interpolation and conversion in ArcMap.

15/03/2019

Bathymetric Survey using Multi-beam Echo Sounder. An insight into ocean floor mapping.

01/03/2019

Niger Delta Area Map

19/02/2019