<p class=ql-align-justify>The Special Issue of <em>Geomatics</em> on Advances in Ocean Mapping and Nautical Cartography addresses emerging methodologies technologies and applications in ocean mapping. This collection includes studies on the development of high-resolution seabed mapping techniques innovative data processing for marine cartography and advancements in hydrographic surveying. It highlights the importance of integrating geospatial data from sources such as remote sensing autonomous underwater vehicles and satellite-based observations. Additionally articles discuss challenges and strategies for ensuring data accuracy and accessibility reflecting a growing interest in sustainable marine resource management and navigation safety enhancements.</p><p class=ql-align-justify></p>