Espoo ground surface dataset depicts the ground surface of Espoo in 2017 and 2013. The data has been collected by laser scanning. The data is a three-dimensional, dot-like dataset depicting the ground.
The ground surface of Espoo is published as LAZ and DWG files by tile. The coordinate reference system of the dataset is ETRS-GK25 (EPSG:3879) and the vertical coordinate reference system N2000.
Dataset published as open data consists of "Model Key Points", not all of the laser points measured. The point cloud has been rarefied and the tolerance is +/- 5 cm. This leads to resolution of 5-10 cm.
2017
The laser scanning was carried out from 2 to 3 May 2017 and thus describes the ground surface of that moment. The flight height of the scanning was 850 m and the target altitude accuracy of the scanning on hard surfaces was 5 cm. The score density of scanning was approximately 20 pts/m2.
2013
The laser scanning was carried out from 7 to 16 May 2013 and thus describes the ground surface of that moment. The flight height of the scanning was 500 m and the target altitude accuracy of the scanning on hard surfaces was 5 cm. The score density of scanning was approximately 10 pts/m2.