THE LAST OF THE WORLD’S OLD ZEPELLIN HANGARS IN RIO DE JANEIRO /BRAZIL

DOCUMENTATION OF AN ENGINEERING HERITAGE.

H.Erwes,W.S.Prado,C.A.Stedile

Instituto Militar de Engenharia, Seção de Engenharia Cartográfica,Praça General Tibúrcio , 80-Praia vermelha 22290-270 Rio de Janeiro -Brasil

prado@ime.eb.br

ABSTRACT

Government authorities of many developed countries are much concerned about documentation and preservation of their historical cultural heritage.

In this context, International organizations show interested in utilization of photogrammetric techniques for the preservation of architectural heritage. This activity requires knowledge of various technologies and involves large investments in documentation and maintenance of monuments within their original characteristics.

The presented project relates to the use of non-metric digital cameras and PhotoModeler software applied to documentation, maintenance and restoration of monuments an historical sites, low cost techniques but with high precision.

For this study a highty interesting object was chosen; the last of the world’s old Zeppelin hangars, situated at Santa Cruz Airbase, close to Rio de Janeiro.

Images were taken in accordance with the requirements of PhotoModeler projects. The photogrammetric models were dimensioned with coordinates obtained by ground control. In this process, the spatial coordinates of well identified and well distributed points of the object were determined by forward intersection and trigonometric leveling, from station of a closed traverse, located around the hangar.

After processing the images with PhoModeler software, an orthophoto and a plot by AutoCAD software of the main façade together with a 3D-model of the object could be generated, confirmed in their dimensions, as a final product. An animation with a flying Zeppelin could be also performed.