Kinematic GPS survey as validation of LIDAR strips accuracy
As a result of the catastrophic hydrogeological events which occurred in May 1998 in Campania, in the south of Italy, the 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,...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2006-06-01
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| Series: | Annals of Geophysics |
| Subjects: | |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3145 |
| _version_ | 1811259447560896512 |
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| author | C. Gordini M. Barbarella |
| author_facet | C. Gordini M. Barbarella |
| author_sort | C. Gordini |
| collection | DOAJ |
| description | As a result of the catastrophic hydrogeological events which occurred in May 1998 in Campania, in the south of Italy, the 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 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. |
| first_indexed | 2024-04-12T18:31:39Z |
| format | Article |
| id | doaj.art-0350d93cc3474c848195233fcc725831 |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-04-12T18:31:39Z |
| publishDate | 2006-06-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-0350d93cc3474c848195233fcc7258312022-12-22T03:21:03ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X2006-06-0149110.4401/ag-3145Kinematic GPS survey as validation of LIDAR strips accuracyC. GordiniM. BarbarellaAs a result of the catastrophic hydrogeological events which occurred in May 1998 in Campania, in the south of Italy, the 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 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.http://www.annalsofgeophysics.eu/index.php/annals/article/view/3145LIDARGPSDTMlandslide bodySarno |
| spellingShingle | C. Gordini M. Barbarella Kinematic GPS survey as validation of LIDAR strips accuracy Annals of Geophysics LIDAR GPS DTM landslide body Sarno |
| title | Kinematic GPS survey as validation of LIDAR strips accuracy |
| title_full | Kinematic GPS survey as validation of LIDAR strips accuracy |
| title_fullStr | Kinematic GPS survey as validation of LIDAR strips accuracy |
| title_full_unstemmed | Kinematic GPS survey as validation of LIDAR strips accuracy |
| title_short | Kinematic GPS survey as validation of LIDAR strips accuracy |
| title_sort | kinematic gps survey as validation of lidar strips accuracy |
| topic | LIDAR GPS DTM landslide body Sarno |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3145 |
| work_keys_str_mv | AT cgordini kinematicgpssurveyasvalidationoflidarstripsaccuracy AT mbarbarella kinematicgpssurveyasvalidationoflidarstripsaccuracy |