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

Marco André de Araújo Gameiro

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.