The Quality Assessment of Different Geolocalisation Methods for a Sensor System to Monitor Structural Health of...

Area of Science:

• Heritage Science
• Geomatics Engineering
• Non-destructive Testing

Background:

• Cultural heritage objects face deterioration from environmental factors like moisture and vibrations.
• Electromagnetic spectroscopy is vital for non-destructive structural health monitoring but lacks spatial geolocalization.
• Accurate georeferencing is essential for processing sensor data and understanding object features.

Purpose of the Study:

• To investigate and compare geolocalization methods for sensor systems used in heritage monitoring.
• To enable precise spatial referencing of multispectral architectural documentation.
• To facilitate data processing for structural analysis and feature identification.

Main Methods:

• Evaluated classical surveying, terrestrial laser scanning (TLS), and Structure-from-Motion (SfM) photogrammetry.
• Applied these methods across three distinct test sites.
• Focused on determining the optimal geolocalization technique for sensor systems.

Main Results:

• Terrestrial laser scanning (TLS) is best suited for simple structures with plain textures.
• Structure-from-Motion (SfM) photogrammetry excels with marble-based and translucent materials.
• Both methods were reviewed and investigated for their geolocalization accuracy.

Conclusions:

• The choice of geolocalization technique depends on the specific characteristics of the cultural heritage structure.
• SfM offers higher accuracy for translucent materials, while TLS is effective for simpler surfaces.
• Accurate geolocalization is a critical step for advanced structural analysis of heritage assets.