Friuli Venezia Giulia Autonomous Region - Enviromental and territorial data catalogue - IRDATfvg

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Elevation models relief LIDAR RAFVG 2017-2020

Abstract: Altimetric models with regular mesh at 0.50 m pitch obtained starting from the point clouds of the LIDAR surveys of the FVG region carried out between 2017 and 2020. For further details, see the dataset "Clouds of LIDAR survey points RAFVG 2017-2020". The following DEMs are available: - DSM first return: it is the regular grid obtained from the first laser pulse to represent the trend of the following surfaces: open land, tops of artifacts and buildings, surface top of the point cloud in areas with multiple echo response - DSM last return: it is the digital model of the surface obtained from the last pulse echo laser. It includes buildings, artifacts and particularly dense and impenetrable vegetation from the laser, open terrain and the lower surface of the point cloud in the response zones ad multiple echoes - DTM: mathematical representation of the terrain without and without vegetation built, by means of an ordered grid of plano-altimetrically determined points - DBM: regular grating that models the course of the land without vegetation with the building. It must be derived from the filtering of the "DSM-last return".

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Alternative title: DEM survey LIDAR RAFVG 2017-2020
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Additional info: The files are available with both ellipsoidal and orthometric dimensions and can be downloaded directly from the Eagle.fvg platform on the regional portal: https://eaglefvg.regione.fvg.it/eagle/main.aspx?configuration=guest using the "download cartographic bases"
Production process: Processing and interpolation of point clouds obtained from LIDAR survey using the Terrascan product and related functions
Source description: DTM (Digital Terrain Model): model generated based on the Ground and ModelKeyPoints classes; it constitutes the surface of the ground as the last return of the laser data, deprived of all the elements above the ground, such as buildings, vegetation, cables, etc. DBM (Digital Building Model): model generated based on the Ground, ModelKeyPoints and Building classes; it is a representation of the terrain and the surface of the building DSM first (Digital Surface Model – first return): model generated using the first (or only) return of the laser, if belonging to the classes Default, Ground, Low Vegetation, Building, Medium Vegetation, High Vegetation, ModelKeyPoints, Wires, Water, Bridge DSM last (Digital Surface Model – last return): model generated using the last (or only) return of the laser, if belonging to the classes Default, Ground, Low Vegetation, Building, ModelKeyPoints, Wires, Water, Bridge
Data accuracy: 20 cm
Data language: ita
Progress status: completed
Maintenance frequency: notPlanned
Maintenance notes: -
Original reference system: RDN2008-TM33NE

Metadata language: ita
Metadata date: 2020-05-19

Subject: Insiel S.p.A.
Role: principalInvestigator
Address: -
web site: http://www.insiel.it
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