Analysis of GNSS, Hydroacoustic and Optoelectronic Data Integration Methods Used in Hydrography

Area of Science:

• Geodesy and Geomatics
• Hydrography
• Geospatial Data Science

Background:

• Hydrographic data integration requires combining results from diverse measurement systems.
• Hydroacoustic and optoelectronic systems possess distinct spatial reference systems and technical implementation methods.
• Effective data integration necessitates addressing challenges in electronics, geodesy, physics (acoustics, optics).

Purpose of the Study:

• To review and compare data fusion methods for hydrographic geospatial data.
• To evaluate data integration techniques against the International Hydrographic Organization (IHO) S-44 standard.
• To present implementation examples of geospatial data integration within Geographic Information Systems (GIS).

Main Methods:

• Data fusion from Global Navigation Satellite System (GNSS) and Real Time Kinematic (RTK) measurements.
• Integration of hydrographic surveys, unmanned vehicle photogrammetry, and Terrestrial Laser Scanning (TLS).
• Comparative analysis of accuracy for selected data fusion methods.

Main Results:

• No uniform data fusion methodology exists due to variations in spatial reference systems and techniques.
• Integration of hydroacoustic and optoelectronic data enables high-accuracy geospatial data acquisition.
• Achieved accuracy for integrated geospatial data is on the order of several centimeters.

Conclusions:

• Hydrographic data fusion, while lacking a standardized approach, successfully yields precise geospatial information.
• The combination of diverse data sources significantly enhances the accuracy and comprehensiveness of hydrographic surveys.
• Centimeter-level accuracy is attainable through the effective integration of hydroacoustic and optoelectronic data.