Mt.Etna volcano high-resolution topography:airborne LiDAR modelling validated by GPS data  

作　　者：Marina Bisson Claudia Spinetti Marco Neri Alessandro Bonforte 

机构地区：[1]Istituto Nazionale di Geofisica e Vulcanologia,via della Faggiola 32,Pisa,Italy [2]Istituto Nazionale di Geofisica e Vulcanologia,Centro Nazionale Terremoti,via di Vigna Murata,Rome,Italy [3]Istituto Nazionale di Geofisica e Vulcanologia,Sezione di Catania,Osservatorio Etneo,Piazza Roma,Catania,Italy

出　　处：《International Journal of Digital Earth》2016年第7期710-732,共23页国际数字地球学报（英文）

基　　金：This work was partially supported by the Ministero dell’Istruzione,Universitàe Ricerca through the Italian Project FIRB FUMO‘Sviluppo Nuove Tecnologie per la Protezione e Difesa del Territorio dai Rischi Naturali’.

摘　　要：High-resolution digital topography is essential for land management and planning in any type of territory as well as the reproduction of the Earth surface in a geocoded digital format that allows several Digital Earth applications.In a volcanic environment,Digital Elevation Models are a valid reference for multi-temporal analyses aimed to observe frequent changes of a volcano edifice and for the relative detailed morphological and structural analyses.For the first time,a DTM(Digital Terrain Model)and a DSM(Digital Surface Model)covering the entire Mt.Etna volcano(Italy)derived from the same airborne Light Detection and Ranging(LiDAR)are here presented.More than 250 million 3D LiDAR points have been processed to distinguish ground elements from natural and anthropic features.The end product is the highly accurate representation of Mt.Etna landscape(DSM)and ground topography(DTM)dated 2005.Both models have a high spatial resolution of 2 m and cover an area of 620 km2.The DTM has been validated by GPS ground control points.The vertical accuracy has been evaluated,resulting in a root-mean-square-error of±0.24 m.The DTM is available as electronic supplement and represents a valid support for various scientific studies.

关 键 词：Airborne LiDAR GPS DEM Mt.Etna 

分 类 号：P22[天文地球—大地测量学与测量工程]