Optech Ilris 3D
 
ILRIS-3D is a compact, fully portable and highly integrated package with digital...
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    Close to the city of Thessaloniki, in Northern Greece, the Patras - Athens - Thessaloniki - Evzoni (P.A.TH.E.) Motorway, which is the main from South to North road transport axis of Greece, crosses the Axios...

  • OPEN PIT MINE APLICATIONS
    (Open pit mines in Croatia)
3D MODELS OF LARGE AREAS

DETAILED 3D MODEL OF THE ISLAND VELIKI KORNAT

It has been two years since the worst firefighting tragedy in Croatian history took place. It was a tragedy in which twelve firefighters lost their lives. This unfortunate event brought together a group of scientists from various fields of expertise in order to find out what really happened. The leading fire experts from other countries gained interest in this tragedy as they had recently experienced similar phenomenon, which they called “eruptive fire”.

The investigation required a detailed and precise 3D model of the canyon between the two hills on the rocky island of Veliki Kornat. It was a great challenge because the area of approx. 50ha needed to be scanned in a short period of time. The project organization was limited to a period of one day because of poor weather conditions (wind and rain) and special transportation that could be provided for only two days. There was a need for fast, accurate, and long-range scan capabilities, with no chance of repeating the procedure. The Optech ILRIS 3D terrestrial laser scanner was the best available solution for such task.

Once again a detailed 3D model of 50ha was used for its various uses. The model was significant as a 3D data base with all the important forensic positions in a National mapping grid with precise mutual spatial positions. As a 3D GIS the data base had the proper annotations and information for each specific position with the possibility of interactive data analysis on the virtual 3D scene. Furthermore, the 3D model was used in a specific program application for the simulation of natural conditions. Topographical contour lines were extracted together with a DEM (Digital Elevation Model) error map making a visual interpretation of the terrain relief. The complete authentic 3D animation and forensic reconstruction was based on the 3D spatial data acquired with a 3D laser scanner and later data processing. 

The 3D model became the key element in further scientific and practical study of the fire phenomenon. All of these efforts were made in order to prevent such tragic events in the future

 

Figure 10. a) Complete final high resolution 3D polygonal mesh model of the 50ha of the Veliki Kornat island canyon made out of data acquired with the Optech ILRIS 3D laser scanner. b) Zoomed part of the high detail 3D model. c) Photograph showing the high detail level of 3D model achieved with the laser scanning technology.

 

Figure 11. Optech ILRIS3D scanner on the Veliki Kornat Island – Kornati natonal park