Work

A lightweight integrated diagnostic approach for Macao Architectural Heritage using 3D laser scanning and NDT

Year: 2026

Type: article

Abstract: This study focuses on the Temple of Kuan Tai and Tin Hau in Taipa, Macau, employing a lightweight integrated approach that combines portable 3D laser scanning and non-destructive testing technologies to achieve high-precision digital documentation and pathological diagnosis of architectural heritage. Through multi-station scanning and point cloud registration, millimeter-level overall accuracy was attained, enabling semantic segmentation and digital archiving of the architectural point cloud. Multi-source data analysis revealed that incense-induced pollutants, under high-humidity conditions, trigger sulfate-based corrosion as the primary mechanism of material deterioration. The integrated methodology, with a total equipment weight of approximately 4 kg, is operationally efficient and minimally invasive, significantly enhancing on-site workflow. This approach provides a reliable scientific basis and technical support for the preventive conservation and digital management of architectural heritage in high-density urban environments.

Source: npj Heritage Science

DOI: 10.1038/s40494-026-02393-y

Authors: Yiru Zheng, Guang Huang, Meng Wang, Yalong Xing, Wei Liu, Kam Kin Lao

Institution: City University of Macau

Language: English

Topic: 3D Surveying and Cultural Heritage

Subfield: Geology

Field: Earth and Planetary Sciences

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Sustainable cities and communities

Open Access status: hybrid

Funder: Fundo para o Desenvolvimento das Ciências e da Tecnologia