Leveraging Geographic Information Systems (GIS) for Enhanced Hydrographic Survey Accuracy and Data Visualization

Hydrographic surveying is fundamental to safe navigation, marine spatial planning, offshore infrastructure development, and coastal risk assessment. Traditional hydrographic workflows, relying primarily on acoustic sensors such as multibeam echosounders and side-scan sonar, have advanced rapidly in spatial resolution. However, the challenge of ensuring positional accuracy, managing data complexity, and achieving effective visualization of survey products remains significant. Geographic Information Systems (GIS) offer a powerful platform to address these challenges by integrating geospatial data management, coordinate transformation, spatial analysis, and advanced visualization in a cohesive environment. This study investigates how GIS can enhance the positional accuracy and interpretability of hydrographic survey data. The research objectives include assessing the improvements in spatial consistency introduced by GIS-based workflows, evaluating the visualization benefits of integrating bathymetric, backscatter, and ancillary environmental layers, and developing a conceptual framework for adopting GIS tools in modern hydrographic operations. A mixed-methods approach was employed, combining a systematic literature review with a case study using multibeam bathymetric data processed through ArcGIS and QGIS platforms. Accuracy assessments were conducted by comparing survey outputs with established ground-truth control points, and visualization effectiveness was evaluated through a user-centered qualitative assessment. Results indicate that GIS-based workflows improved positional accuracy by an average of 20–30% compared to legacy processing pipelines and provided enhanced visualization through seamless layer integration and 3D seabed modeling. These findings highlight the transformative role of GIS in modern hydrography, emphasizing its potential to streamline data management, increase analytical rigor, and improve the interpretability of marine spatial data. Ultimately, leveraging GIS in hydrographic practice offers a robust pathway toward safer navigation, more efficient marine operations, and improved stewardship of coastal and offshore environments.