Reconstruction of Urban Vegetation Based on Laser Scanner Data at Leaf-Off Aerial Flight Times – First Results
نویسنده
چکیده
* Corresponding author. Abstract – Caused by the importance of urban vegetation volume as an indicator for ecologically orientated city planning and since there are several cities which already use laser scanner data at leaf-off aerial flight times for creating 3D city models the idea merges of using this data for that purpose. This paper deals with the question whether laser scanner data that has not been taken during the vegetation period allows a determination of vegetation volume with sufficient accuracy. The work sets up on previous results where laser scanner data has been compared to photogrammetrically determined vegetation height measurements. Starting from the existence of different response characteristics within various vegetation types the ratio of point density of classified non-ground points is detailed analysed, and might be used as a parameter for a point density controlled reconstruction of the laser response within the vegetation stock. Attempts of reconstruction are demonstrated.
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