2008 bathymetric LIDAR of Gipuzkoa. Orthometric height (EPSG: 7582). (GFA.BL08REDNAP08.LT05)

Bathymetric LIDAR point cloud from LIDAR generated by Blom Aerofilms in 2008.

Alternate title: Bathymetric LIDAR completed in 2008 (25-06-2008 - 29-01-2009).

Topic category

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Reference system identifier

ETRS89-UTM30N[EPSG:25830]

Distribution format

LAZ - Point cloud. Binary standard for the exchange of LIDAR data. 1km x 1km tiles. ( 1 )

OnLine resource: https://b5m.gipuzkoa.eus/lidar/2008/08_ba_RedNAP08/LT05_08_ba_RedNAP08.laz

Geographic identifier

Bathymetric point cloud of Gipuzkoa.

Relative internal positional accuracy

Measure identification

LIDAR point cloud with irregular distribution, collected by Bloom Aerofilms.

Explanation: RMSE between measured coordinates. Quality control checks against existing SCA data to confirm accuracy.The results from the SCA and GCA analysis confirm that the data in the seaward areas when compared to known points from the existing survey are within specification of ±0.25 RMSE and average DZ of +0.01m. Consistency (vertical and horizontal accuracy) is 100%. Orthometric height obtained with EGM08_REDNAP of the IGN.

Statement: Bathymetric LIDAR flight of 105 flight lines between 25-06-2008 - 28-06-2008 and 29-01-2009 with a Hawk Eye II sensor. The orientation and trajectories of the sensor are tied to the Gernika GPS Station using CSS v2.1 and TerraMatch software. And subsequent adjustment using 7 bathymetric and 4 terrestrial control points. The average density obtained is 0.25 points/m² and the average depth is 7.5 m. In 2012 the elevation is corrected by 0.94 m. It is distributed by laz files (Las 1.0 compressed) in 1 x 1 km grids containing for each point: x, y, z, intensity, return number, classification and GPS time. Orthometric coordinates obtained from the geoid model EGM08_REDNAP of the National Geographic Institute.

No information provided.

Attribute description: LAZ point cloud, in 1km² grids. Orthometric height. Height corresponds to the bare seafloor. Floating structures and rogue points (due to backscatter) have been removed. Puntu hodeia LAZ formatuan, 1km² bloketan. Kota ortometrikoa. Itsaszoru barearen kota dau hau; igerian dauden estruktura, puntu okerrak (retrodispersioak sortuta) eta bestelakoak ezabatu egin dira. Nube de puntos en LAZ, en bloques de 1km². Cota ortométrica. La cota corresponde al lecho maríno desnudo. Se han eliminado estructuras flotantes y puntos erróneos (debidos a la retrodispersión).