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Communication Dans Un Congrès Année : 1999

A photogrammetric survey using knowledge representation on the arpenteur web-based photogrammetric workstation

Résumé

ARPENTEUR is an application for digital photogrammetry mainly dedicated to architecture (Architectural
PhotogrammEtry Network Tool for EdUcation and Research). One can freely access ARPENTEUR via the internet
(http://moma.gamsau.archi.fr or http://photogeo.u-strasbg.fr). Usual steps of inner and outer orientation are
implemented in order to generate a photogrammetric stereomodel.
ARPENTEUR has been developed thanks to the collaboration of two complementary research laboratories : the group
“Photogrammetry and Geomatics” of ENSAIS-LERGEC's laboratory (Strasbourg, France) and the Gamsau-MAP
CNRS laboratory (CNRS : French National Body for Scientific Research) located in school of Architecture
(Marseilles, France).
This paper focuses on a new approach of photogrammetric surveying in which formalised architectural knowledge is a
prerequisite to the measurement process. The first step of the survey is therefore a rigorous analysis of the
architectural corpus used in the building. All the architectural elements which are expected to be measured are
defined and organised in a hierarchy of concepts and formalised using the Java™ object language capabilities.
The purpose of the photogrammetric measurement is then to inform the architectural geometrical model with data
such as location, orientation and dimension. Each architectural element considered is given within its definition a
redundant set of geometrical primitives that can be observed on its surface. These primitives appear as a geometrical
interpretation of the architectural element's morphology. Depending on the case study's specificity, one can choose to
measure a subset of these primitives. Unmeasured data (occulted zone on a picture, ... ) should be generated by the
system using both theoretical model and measured data.
We propose an experimentation of this process on the old town hall tower, in Kraków (Poland). Images used in the
system were taken with a point and shoot digital camera. The experimentation focuses the neo-gothic addition to the
original XIVth century tower. Elements considered therefore correspond to a reconstruction based on a historical
analysis of Kraków's gothic urban corpus.
The model resulting from the survey process can be visualised either on the internet-oriented VRML plug-ins, or
inside the Microstation™ software.
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Dates et versions

halshs-00277033 , version 1 (05-05-2008)

Identifiants

  • HAL Id : halshs-00277033 , version 1

Citer

Pierre Drap, Pierre Grussenmeyer, Jean-Yves Blaise. A photogrammetric survey using knowledge representation on the arpenteur web-based photogrammetric workstation. XVII CIPA (INTERNATIONAL COMMITTEE FOR ARCHITECTURAL PHOTOGRAMMETRY) INTERNATIONAL SYMPOSIUM, 1999, Brazil. pp.1-8. ⟨halshs-00277033⟩
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