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7] 
SURVEYING METHODS OF ARCHITECTURAL HERITAGE 
FOR A GIS IMPLEMENTATION 
M.Caprioli^, R. Bologna , A.Scognamiglio * 
* Dipartimento Vie e Trasporti - Politecnico di Bari 
v. Orabona 4 - BARI 
m.caprioli@poliba.it 
Commission V, WG V/4 
KEY WORDS: Cultural Heritage, Architecture, GIS, Photogrammetry, Modelling, Laser scanning 
ABSTRACT: 
Using the most recent survey techniques of an Architectural or Monumental Heritage, this study investigates problems on three- 
dimensional modelling in order to develop and to promote vision metrology and to implement Architectural Informative Systems. 
Treatment of different survey techniques aims at defining, in a systematic way, their own distinct procedures and, meanwhile, 
investigating numerous utilisations for various fields of application. 
It is plain that the achievable accuracy, with specific characteristics of every single technique, determines a considerable variety of 
attainable products that vary from navigable three-dimensional models for tourist and popular aims to 3D Informative System for 
Architectural Heritage conservation. 
As a first approximation, it is intuitively remarked that Laser Scanning and Metric Cameras Photogrammetric survey products will 
be addressed to GIS for precious Monumental Heritage, in which accurate control operations of spatial information, with perfect 
metric object knowledge for conservation and restoration, it is necessary. All this is true both for Architectonic manufactures and 
other artistic and historical works that would be studied and preserved. 
Recent instruments with minor accuracy achievable (digital cameras, etc.) can certainly be utilized for three-dimensional models, 
also with 3D Modelling and Virtual Reality techniques, in order to permit public knowledge and fruition of monuments. In this case 
we want investigate in such situations they already are a valid alternative in the field of Monument metric description. 
In this study we analyse an Italian Church situated in country of the municipal district of Conversano (Bari), in the Apulia region. 
In October 2001 we started a first survey campaign with Laser Scan 3D LMS Z210 of Riegl. 
This work investigates most of all the methodology of the reconstruction of the Digital Elevation Model of the monument whether 
photogrammetry with the automatic correlation of images or either with the software instruments of Laser apparatus. 
Such spatial informative system model can aid image analysis operations, supporting Restoration and Conservation projecting 
decisions. 
With this work we attempt utilization of architectural survey instruments in order to obtain implementation of a GIS able to cross 
both the enough used bidimensional and three-dimensional dimension. This last can better describe Architectural or Monumental 
objects. 
Historical and architectonic notes The masonry is made of blocks of calcareous stone arranged in 
a thick plot of concentric rings for each lobe. The masonry 
closes with a frame that divides the superior level, constituted 
by an octagonal cupola drum, which is closed by shed roof and 
However, several studies assume Byzantines, Greeks, dominated by a quadrangular little steeple covered by a spire. 
Armenians or Syrians influences. 
The S. Catherine’s church in Conversano, in the province of 
Bari, has a singular “quadrilobata” plan of unsure origin. 
The construction of the Church has an uncertain temporal 
collocation because it oscillates between the XI and the XIV 
century due to the lack of precise probative documents. 
The Church is placed less than 1 km from the city of 
Conversano in the countryside of Apulia region. 
It has a plan made of four semicircles welded in a life edge. 
The radius of the semicircles corresponds approximately at the 
half of the circumference that circumscribes all the plan of the 
church. Even in the cross-section is a correlation between the 
dimensions, finding in the radius of the cupola curve, the same 
dimension of the radius in each lobe of the plan. 
The inside is completely perusal and realizes a very interesting 
space just because of the relationships elapsing among the 
dimensions of the single elements both in the plant that in 
section. 
The corrent aspect of the church is due to the restoration made 
in 1935 which altereted the original aspect by modifying several 
parts in an arbitrary way. 
The choise of this particular type of Architectural Heritage, 
with many kinds of curved walls, is intentional in order to 
investigate several methodology of survey. 
—333—