Print Email Facebook Twitter Automated large scale parameter extraction of road-side trees sampled by a laser mobile mapping system Title Automated large scale parameter extraction of road-side trees sampled by a laser mobile mapping system Author Lindenbergh, R.C. Berthold, D. Sirmacek, B. Herrero-Huerta, M. Wang, J. Ebersbach, D. Faculty Civil Engineering and Geosciences Department Geoscience & Remote Sensing Date 2015-09-28 Abstract In urbanized Western Europe trees are considered an important component of the built-up environment. This also means that there is an increasing demand for tree inventories. Laser mobile mapping systems provide an efficient and accurate way to sample the 3D road surrounding including notable roadside trees. Indeed, at, say, 50 km/h such systems collect point clouds consisting of half a million points per 100m. Method exists that extract tree parameters from relatively small patches of such data, but a remaining challenge is to operationally extract roadside tree parameters at regional level. For this purpose a workflow is presented as follows: The input point clouds are consecutively downsampled, retiled, classified, segmented into individual trees and upsampled to enable automated extraction of tree location, tree height, canopy diameter and trunk diameter at breast height (DBH). The workflow is implemented to work on a laser mobile mapping data set sampling 100 km of road in Sachsen, Germany and is tested on a stretch of road of 7km long. Along this road, the method detected 315 trees that were considered well detected and 56 clusters of tree points were no individual trees could be identified. Using voxels, the data volume could be reduced by about 97 % in a default scenario. Processing the results of this scenario took 2500 seconds, corresponding to about 10 km/h, which is getting close to but is still below the acquisition rate which is estimated at 50 km/h. Subject big datalaser mobile mappingtree parametersurbanvoxels To reference this document use: http://resolver.tudelft.nl/uuid:ea283396-728d-4074-8aa2-c788077b6ed3 Publisher ISPRS ISSN 2194-9042 Source https://doi.org/10.5194/isprsannals-II-3-W5-137-2015 Source International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XL-3/W3, 2015. ISPRS Geospatial Week 2015, La Grande Motte, France, 28 September-3 October 2015 Part of collection Institutional Repository Document type conference paper Rights © 2015 The Author(s)This work is distributed under the Creative Commons Attribution 3.0 License Files PDF 320462.pdf 914.48 KB Close viewer /islandora/object/uuid:ea283396-728d-4074-8aa2-c788077b6ed3/datastream/OBJ/view