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Recent technical developments have enabled us to acquire high-definition topographic and geophysical data for geoscientific research, including land surface processes, subsurface structures, submarine/aerial environments, and geo-ecological interactions. Such high-definition or high-resolution data of the Earth's surface, hereby referred to as HiMESD (High-definition Multilayered Earth Surface Data), are particularly useful for studies on landscape developments over relatively short-term (decadal to millennial time scales), which are often assessed with the concept of connectivity in spatial and temporal contexts. HiMESD from the ground, airborne, and sometimes satellite platforms has become ubiquitous in everyday life, while it plays a central role in quantifying and understanding multiple "connectivity" such as sediment, geomorphic, hydrological, and ecological connectivity. HiMESD at various scales, from the micro-scale of rock weathering to the macro-scale spanning several tens of kilometers of fault lines. 
In this session, we invite submissions on topics that challenge the issues of connectivity in the modern Earth surface environment, including the Anthropocene. A range of topics would fit the session framework, including theoretical work, data acquisition, pre- and post-processing, extensive data preservation and archiving, geostatistical analysis, physical modeling, artificial intelligence (machine learning or deep learning), and numerical simulation. The methodological approaches may include, but are not limited to, laser scanning (Lidar), photogrammetry (SfM), GNSS precise positioning, SAR interferometry, multi-beam sonar, ground-penetrating radar, geomagnetic/electromagnetic sensors, and multi/hyperspectral sensors, based on terrestrial (fixed or mobile), aerial (UAS/UAV or manned airborne), or satellite platforms.