Mapping Rock Density in Ireland via Image-Based Geological Classification and Geodetic Modeling

This study presents a comprehensive geospatial and geophysical workflow designed to develop a detailed rock density model for Ireland. The methodology integrates image-based classification of geological maps, specifically from the Geological Survey of Ireland (GSI), with precise geodetic computations. We detail the procedures for classifying rock types based on RGB values, assigning accurate geographic coordi- nates (WGS84 and Irish Transverse Mercator - ITM), and computing crucial elevation data including ellipsoidal, geoid, and orthometric heights. A Digital Elevation Model (DEM) is then generated through interpolation using the derived height information. The resultant multi-dimensional dataset provides spatial, geological, and comprehen- sive elevation attributes for each processed pixel across the entire Irish landmass. This innovative approach offers a data-driven solution for large-scale geological characteri- zation, which is fundamental for diverse Earth science applications, including accurate geoid modeling, gravimetric data interpretation, resource management, geotechnical assessments, and environmental planning. The paper elucidates the methodologies, presents the initial results, and discusses current implementation considerations and future directions for enhancing model precision.