LIDAR assembly table for the Flooding Directive cycle 1 Rhône-Alpes

Assembling table of the 5460 Digital Terrain Model (DNT) and Digital Surface Model (MNS) slabs in ASC format acquired by DREAL in 2013 to meet the needs of the IRR Flood Directive of Annecy, Chambery, Grenoble, Albertville, Lyon, Saint-Etienne, Macon, Romans, Valencia and Vienna. Density and accuracy of data The following characteristics concerning the accuracy of the measured Lidar echoes are imposed: Each m² contains two pulses per m²; planimetric details: better than 50 cm in X and Y; altimeter accuracy: better than 20 cm in Z; The slabs have a step of 1 m and are 1kmx1km. Their weight is 5 to 7 MB; The reversals were carried out by the IMAO and TOPOGEODIS service providers according to the specifications of the IGN Alti Lidar RGE (same specifications). The data collected is intended to feed the IGN Alti RGE. To obtain this data freely, make a request to DREAL by providing the list of slabs to be obtained. If the number is less than 200 slabs (1 GB) it will be sent digitally, otherwise it will be by hard drive made available to the DREAL by the applicant.