Morphological updating on the basis of integrated DTMs: study on the Albano and Nemi craters
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G. Pietrantonio
Abstract
The Colli Albani Volcano has recently developed particular interest in the geophysical community for some peculiar characteristics imputable to a recent residual volcanic activity, thus evidencing that it cannot be considered extinguished yet.
On April 2006 an airborne laser scanning (ALS) survey of the Albano and Nemi craters has been carried out to obtain a high resolution digital terrain model (DTM) of the area. We have compared the accuracy of the ALS heights with those obtained by a fast GPS kinematic survey, obtaining maximum deviation within 50 cm. Then, we have integrated the ALS survey of the craters and the bathymetry of the Albano lake to achieve a complete DTM, useful for morphological studies. In addition, with a GNSS/RTK survey (July 2007) we have estimated the Albano and Nemi mean lake levels respectively at 288.16 m and 319.02 m (asl). Based on the integrated DTM and the newly estimated water level values, we have evaluated about 21.7 · 106 of m3 the water volume loss of the Albano lake from 1993 to 2007, with an average rate of about 1.6 · 106 m3/yr.
© de Gruyter 2008
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Articles in the same Issue
- On-the-job detection and correction of systematic cyclic distance measurement errors of terrestrial laser scanners
- Design and analysis of a multi-sensor deformation detection system
- A model for predicting GPS-GDOP and its probability using LiDAR data and ultra rapid product
- The switch from relative to absolute phase centre variation model and its impact on coordinate estimates within local engineering networks
- Reference point determination with a new mathematical model at the 20 m VLBI radio telescope in Wettzell
- Morphological updating on the basis of integrated DTMs: study on the Albano and Nemi craters
- 9th Conference on Optical 3-D Measurement Techniques
