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The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Articles | Volume XLVIII-1/W2-2023
https://doi.org/10.5194/isprs-archives-XLVIII-1-W2-2023-1861-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/isprs-archives-XLVIII-1-W2-2023-1861-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
14 Dec 2023
| 14 Dec 2023
HYPERSPECTRAL UAS IMAGERY FOR GRASS SWARDS BIOMASS AND NITROGEN ESTIMATION
R. A. Oliveira
Dept. of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute of National Land Survey of Finland, Vuorimehentie, 02150, Espoo, Finland
R. Näsi
Dept. of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute of National Land Survey of Finland, Vuorimehentie, 02150, Espoo, Finland
P. Korhonen
Natural Resources Institute Finland (Luke), Finland
A. Mustonen
Natural Resources Institute Finland (Luke), Finland
O. Niemeläinen
Natural Resources Institute Finland (Luke), Finland
N. Koivumäki
Dept. of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute of National Land Survey of Finland, Vuorimehentie, 02150, Espoo, Finland
T. Hakala
Dept. of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute of National Land Survey of Finland, Vuorimehentie, 02150, Espoo, Finland
J. Suomalainen
Dept. of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute of National Land Survey of Finland, Vuorimehentie, 02150, Espoo, Finland
J. Kaivosoja
Natural Resources Institute Finland (Luke), Finland
E. Honkavaara
Dept. of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute of National Land Survey of Finland, Vuorimehentie, 02150, Espoo, Finland
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Short summary
Short summary
Understanding the contribution of the vegetation and dune size to nebkha dune growth could improve model predictions on coastal dune development. We monitored a natural nebkha dune field with a drone with camera. Our results show that dune growth in summer is mainly determined by dune size, whereas in winter dune growth was determined by vegetation. In our study area the growth of exposed dunes was restricted by storm erosion, whereas growth of sheltered dunes was restricted by sand supply.
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Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-3-W4, 109–115, https://doi.org/10.5194/isprs-archives-XL-3-W4-109-2016, https://doi.org/10.5194/isprs-archives-XL-3-W4-109-2016, 2016
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Short summary
Short summary
Light-absorbing impurities change the reflectance of snow in different ways. Some particles are heated by the Sun and they sink out of sight. During the process, snow may look darker than pure snow when observed by nadir, but at larger view zenith angles the snow may look as white as clean snow. Thus an observer on the ground may overestimate the albedo, while a satellite underestimates the albedo. Climate studies need to examine how the contaminants behave in snow, not only their total amounts.
The International Society for Photogrammetry and Remote Sensing is a non-governmental organization devoted to the development of international cooperation for the advancement of photogrammetry and remote sensing and their applications. The Society operates without any discrimination on grounds of race, religion, nationality, or political philosophy.
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