Kinematic GPS survey as validation of LIDAR strips accuracy

Kinematic GPS survey as validation of LIDAR strips accuracy

Blog Article

As a result of the catastrophic hydrogeological events which occurred in May 1998 in Campania, in the south of Italy, the Investigating the effect of context factors on the effectiveness of brand placement in movies distinctive features of airborne laser scanning mounted on a helicopter were used to survey the landslides at Sarno and Quindici.In order to survey the entire zone of interest, approximately 21 km2, it was necessary to scan 12 laser strips.Many problems arose during the survey: difficulties in receiving the GPS signal, complex terrain features and unfavorable atmospheric conditions.These problems were investigated and it emerged that one of the most influential factors is the quality of GPS signals.

By analysing the original GPS data, the traces obtained by fixing phase ambiguity with an On The Fly (OTF) algorithm were isolated from those with smoothed differential GPS solution (DGPS).Processing and analysis of laser data showed that not all the overlapping laser strips were congruent with each other.Since an external survey to verify the laser data accuracy was necessary, it was decided to utilize the The Pilgrimage to the Holy Face of Lucca in 1896: Documents and News from the Archive of the Congregation of the Holy Face kinematic GPS technique.The laser strips were subsequently adjusted, using the kinematic GPS data as reference points.

Bearing in mind that in mountainous areas like the one studied here it is not possible to obtain nominal precision and accuracy, a good result was nevertheless obtained with a Digital Terrain Model (DTM) of all the zones of interest.