Indian National Centre for Ocean Information Services

4. Indian National Centre for Ocean Information Services(INCOIS), Ministry of Earth Science, GOI

A case study was taken up to showcase the potential of low cost micro-UAV mapping applications for possible tsunami emergence response and enforcement of laws to control growth of structural developmental work along coastal vulnerable areas. The 500 sq.km area was taken up on the East coast of Southern India for case study. The objective of the study was to carry out a microscopic estimate in both, qualitative and quantitative, analysis using quality information viz. accurate height of each building of the residential/commercial facility, engineering structure type like concrete or mud house or poorly constructed etc, and exact property boundary, with all associated demographic information. The demonstrated project was accomplished by acquiring aerial images with the help of in-house developed micro-UAV, having on-board a 24 MP consumer camera (Sony ILCE 6000), flown at 150m above ground level which has provided images of 5 cm Ground Sampling Distance (GSD). About 2, 00,000 images were captured by the UAV & processed through photogrammetry software using High end GPU enabled computer system. A high resolution Surface Model and Orthophotos were obtained with 10 cm of horizontal accuracy & 15 cm of vertical accuracy. Then a 3D Terrain Model was created using the high resolution Surface Model & accurate Orthophotos for microscopic 3D dimensional visualization, simulation & analysis. By using this model one can visualize the extent of flooding, type of buildings & structures, quantum of population likely to be affected at various levels of Tsunami waves.

Fig 4 : 3D Mapping of Tsunami Vulnerable Residential and Commercial Buildings