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Auflistung nach Autor:in "Storch, Marcel"

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  • Konferenzbeitrag
    Comparison of UAV- and mowing machine-mounted LiDAR for grassland canopy height estimation
    (44. GIL - Jahrestagung, Biodiversität fördern durch digitale Landwirtschaft, 2024) Bracke, Justus; Storch, Marcel; Bald, Janis; Jarmer, Thomas
    Towards autonomous process monitoring, canopy height estimation in grassland based on data from a mowing machine-mounted LiDAR and a UAV-LiDAR system is compared to manually measured ground truth heights. In a field trial, a LiDAR mounted on the cabin roof of the mowing machine recorded data during the mowing process, while two recording flights before and after the mowing were conducted with a UAV-LiDAR. The data from both systems were processed similarly and parameters such as height estimation method, spatial resolution and percentile filters were systematically varied to investigate their influence on height estimation accuracy. Statistical evaluation showed that canopy height estimates based on the UAV-LiDAR (R² = 0.89, RMSE = 0.05 m) were more accurate and precise than those based on the mowing machine-mounted LiDAR (R² = 0.51, RMSE = 0.08 m). The influence of the different investigated parameters varied.
  • Konferenzbeitrag
    A coupled multitemporal UAV-based LiDAR and multispectral data approach to model dry biomass of maize
    (43. GIL-Jahrestagung, Resiliente Agri-Food-Systeme, 2023) Rettig, Robert; Storch, Marcel; Wittstruck, Lucas; Ansah, Christabel; Bald, Richard Janis; Richard, David; Trautz, Dieter; Jarmer, Thomas
    The presented approach attempts to highlight the capabilities of a data fusion approach that combines UAV LiDAR (RIEGL – miniVUX-1UAV) and multispectral data (Micasense – Altum) to assess the dry above ground biomass (AGB) for maize. The combined acquisition of both LiDAR and multispectral data not only supports estimates of AGB when fusing them, but also helps to evaluate phenological stage-specific modelling differences on the individual sensor data. A multiple linear regression was applied on the multisensorial UAV data from two appointments in 2021. The resulting R² of 0.87 and RMSE of 14.35 g/plant for AGB was then transferred to AGB in dt/ha.