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 Prevention and Management of Physical
Disasters and the surveyors involvement. 

• by Emmanuel Ouranos
• Hellenic Mapping and Cadastral Organization,
  Director
• Dipl. Surveying Engineer, Msc Regional
  Development
• ex CLGE delegate, representative of HARSE
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The statue of Victory at the Olympic site, in
front of the forest fire
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TSUNAMI
image of a natural disaster
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Number of natural disasters recorded per year
1900-2005
Number of natural disasters recorded per year
1900-2005
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• I.    The systematic approach of Natural
  Hazards and Natural Disasters
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• The growing strength, frequency, large scale
  and long duration of natural hazards recently,
  was the cause of
• The systematic study of natural risks, the
  logical planning of public and private works and
  the estimation and prediction to minimize the
  risk
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• II. The role of the surveyor in the prevention
  and management of Natural Hazards.
•  
• The news from Greece are the following
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•    HEPOS, the Hellenic Positioning System is
  ready, with 100 ground stations in use. As part
  of European Spatial Data Infrastructure. It will
  help to connect Geodesy and the Cadastre
  frameworks.
•    ORTHOPHOTO MAPS, 15.000 scales coming
  from new air photos will be ready soon, for the
  total area of the country.

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•         CADASTRAL OFFICES in the place of
  100 mortgages offices are now in work in nearly
  1/3 of these offices. It is an important step to
  the final goal of having a new modern and
  operational Greek Cadastre.
•         FOREST and COASTAL MAPS will be soon
  prepared for all Greece. Special forest maps for
  all the country, that means for 20 of the
  country area.
•         LPIS (Land Parcel Information
  System) is a GIS system with all parcels with
  olive trees and vineyards for 4 million hectares.
  This mapping is done in scales 110.000 and print
  in 15.000.
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• The question is what all this has to do with the
  Prevention and Management of Physical Hazards and
  Disasters?
• After a big forest fire, comes the loss of public
  property. Speaking of natural hazards, these
  are the following
• Seism, Tsunamis, Volcanos Explosions,
  Inundations, Floods, Strong Rainfalls, Snowfalls,
  Strong Winds-Typhoons, Forest and city Fires,
  Coastal corrosion, Land corrosion, Land
  Devastation, Changes of sea Level, Landslides.
• The first picture we have in mind is the map of
  the area where the disaster occurred. And we, the
  surveyors are the specialists to create this map,
  the G.I.S.
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• The following analysis is prepared
•       The Hazard Assessment,
•        The Exposure to Danger,
•        The Vulnerability to Damages.
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• They are all presented in various maps and GIS.

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• The maps of roads and highways give us the
  necessary information and the base to create a
  general plan to manage a big disaster with the
  minimum loss.

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The result of a flood in some ancient ruins
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EU order 2007/60HazardRiskVulnerabilityFlood
riskFlood hazard mapFlood risk map
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• Preliminary flood risk assessment
• Flood hazard maps
• Flood risk maps
• Flood risk plans

22 December 2011 22 December 2013 22 December
2015
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The
Example of Rapendosa
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The photogrammetric analysis Color air
photos(September2005) Scale 115.000 (Army
Geographic Departement)High Definition Digital
Ground ModelReference Points every 25mThe
Rapendosa Vacuum ? 14 photos , in 3 lines
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The ground model
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The Land Use
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The Flood estimation map
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• III.    Satellite monitoring changes on the
  Earth surface.
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• In Dionysos Satellite Observatory, among
  other works, under the direction of NTUA
  professor D. Paradeisis, is possible the
  teledetection of small landslides , floods,
  volcanos action, any physical risks, through
  satellite radar (SAR Synthetic Aperture Radar).
  Especially by the technology of SAR
  Interferometry and Dynamic InSAR Tracking,
  monitoring in real time is now possible, in
  collaboration with NASA Space Flight Center.
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Interferometrys example INSAR Tracking
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• IV.              Conclusions.
• The involvement of the Surveying Engineer.
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• It is obvious now that surveying engineers
  have to do with the prevention and management of
  Physical Hazards and Disasters.
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• References
• 1.    Space radar technology and Physical
  Disasters. B. Massinas , D. Paradeisis. NTUA.
• 2.    The involvement of the Geodetic Surveyor in
  the Prevention and Management of Physical
  Disasters. John Presvelos. HARSE.
• 3.    Systematic Analysis of Physical Hazards. G.
  Tsakiris. NTUA.
• 4.    LPIS. Land Parcels Identification System
  and physical disasters. D. Sxisodimou.
  HARSE.
• 5.    The HEPOS and its foreseeable implications
  on the SPI in Greece. Demitris Delikaraoglou. FIG
  comm. 3, 2007.
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Thank you for your attention! 
Any questions?