International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XL-5/W2, 2013 
XXIV International CIPA Symposium, 2 — 6 September 2013, Strasbourg, France 
THREE-DIMENSIONAL MODELING OF THE ROMANESQUE CHURCH OF SANTA 
MARIA DE CASTRELOS (VIGO — SPAIN) USING TERRESTRIAL LASER SCANNER 
A. Soria-Medina * *, J. Martinez”, P. Arias ® J. Armesto ®, A. Z. Buffara-Antunes * 
* UFPR, Geomatics Department, Federal University of Parana, Curitiba, Parana, Brazil - (asmedina, felipe) @ufpr.br 
? Natural Resources Department, Mining School, University of Vigo, Spain, (Joaquin.martinez, parias, Julia)@uvigo.es 
KEY WORDS: Terrestrial laser scanning, Romanesque Church, 3D model, Planes, Sections, CAD 
ABSTRACT: 
This article shows the results obtained in the three dimensional survey of the church of Santa Maria of Castrelos realized through a 
terrestrial Laser Scanner. The Church of Santa Maria of Castrelos, which was built in the early thirteenth century, is located in Vigo 
Spain. It is a Romanesque style church with a nave and semicircular apse with three gates decorated with rosettes and typically 
Department, Mining School, at University of Vigo - Spain, jointly with the Geomatics Department, Federal University of Parana - 
Brazil. This work explores the use of laser scanning for the surveying, three-dimensional modeling and documentation of historical 
monuments but also the generation of quoted plans and cross sections of this Romanesque church in the city of Vigo. The resolution 
of point clouds used to obtain the models varied according to need. Namely, the point cloud used for three-dimensional model for 
the general external and internal church was used with an approximate step width of 10 cm, while 5 cm and 1 cm step widths were 
1. INTRODUCTION Romanesque geometrical figures. The figure 1 shows the Santa 
Maria of Castrelos church. 
1.1 General Instructions 
Surveying the cultural heritage is very important to document 
the natural, historical and touristic heritage and connect the past 
and the future for any nation. There are many methods for the 
documentation of the cultural heritage, like traditional manual 
measurement, topographical, Photogrammetric and Laser 
scanning methods. 
In recent years, with the use of laser scanning technology for 
Photogrammetric applications thousands of points on objects 
surface are obtained with less effort in terms of time and cost 
than required for three dimensional measurements based on 
classic methods. 
In this study, the potential of the use of terrestrial laser scanner 
in the documentation of historical heritage is shown, both for 
3D modeling of joint external and internal point clouds as well 
as for generation of planes and sections of the church of Santa 
  
Maria of Castrelos, Vigo. Figurel Santa Maria of Castrelos Church. 
2. MATERIAL AND METHOD 2.2 Terrestrial Laser Scanner Riegl-390i 
2.1 Santa Maria de Castrelos Church This scanner is based on the time-of-flight (TOF) principle and 
has a laser source that emits pulses with a wavelength of 1500 
nm. This device measures distances in the range of 1.5 to 400 m 
with an accuracy rating of 6 mm at a distance of 50 m in normal 
conditions of illumination and reflectivity. The Riegl 390i is an 
hybrid laser: this means that the scanning is unrestricted in the 
The Church of Santa Maria of Castrelos, which was built in the 
early thirteenth century, is located in Vigo Spain. It is a 
Romanesque style church with a nave and semicircular apse 
with three gates decorated with rosettes and typically 
  
* Corresponding author. asmedina@ufpr.br. 
601