The Candis (temples) of Java represent sophisticated ancient building heritage
and are key features for Javanese people to identify with their own culture. Candis occupy a
significant position in the cultural history of Southeast Asia and rank among the most
outstanding examples of Buddhist and Hindu architecture. Well-known Candis such as
Borobudur or Prambanan are also top-ranked tourist destinations.
This ancient heritage is threatened by Indonesia’s geographical location within the Pacific
Ring of Fire, a tectonic subduction zone prone to environmental catastrophes such as
earthquakes, volcanic eruptions and the resulting tsunamis. Previous work presented a
monitoring workflow for analysing variations in the geometry of these temples to gain an
understanding of structural changes produced by seismic events. As part of that workflow, we
proposed a combined laser scanning and UAV-supported image match point cloud model which
can be compared to a photogrammetric data set in order to provide a quick, inexpensive, and
easily accessible monitoring technique. While methodology has already proved useful, some
aspects still need to be refined. Also, further understanding about the structural composition of
the objects being examined and what changes of geometry can be expected within the analysis
after earthquakes needs to be collected.
An analysis is presented of changes that have happened within the structure over a period
of several years and numerous seismic events to facilitate an understanding of geometric
changes that can occur. Furthermore, this re-evaluation by laser scanning will be compared to
a set of image-match models to investigate factors that have an impact on the reliability and
accuracy of such models. Manuals drafted by the project team and introduced in previous work
explain how to capture image data to be processed into photogrammetric models. Amendments
and revisions will be made to these manuals based on new data and experiences collected
during the ongoing Candi Sari case study presented in this paper.
Abstract
The Candis (temples) of Java represent sophisticated ancient building heritage
and are key features for Javanese people to identify with their own culture. Candis occupy a
significant position in the cultural history of Southeast Asia and rank among the most [...]