Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Wilfried Karel"'
Autor:
Livia Piermattei, Wilfried Karel, Di Wang, Martin Wieser, Martin Mokroš, Peter Surový, Milan Koreň, Julián Tomaštík, Norbert Pfeifer, Markus Hollaus
Publikováno v:
Remote Sensing, Vol 11, Iss 8, p 950 (2019)
The measurements of tree attributes required for forest monitoring and management planning, e.g., National Forest Inventories, are derived by rather time-consuming field measurements on sample plots, using calipers and measurement tapes. Therefore, f
Externí odkaz:
https://doaj.org/article/f74b1e75cf5d4396b3511b122a53a166
Autor:
Livia Piermattei, Mauro Marty, Wilfried Karel, Camillo Ressl, Markus Hollaus, Christian Ginzler, Norbert Pfeifer
Publikováno v:
Remote Sensing, Vol 10, Iss 10, p 1542 (2018)
This work focuses on the accuracy estimation of canopy height models (CHMs) derived from image matching of Pléiades stereo imagery over forested mountain areas. To determine the height above ground and hence canopy height in forest areas, we use nor
Externí odkaz:
https://doaj.org/article/5387d4db198745cb8e3a1e7157dd03c7
Publikováno v:
Remote Sensing, Vol 8, Iss 3, p 209 (2016)
The main purpose of any aerial photo archive is to allow quick access to images based on content and location. Therefore, next to a description of technical parameters and depicted content, georeferencing of every image is of vital importance. This c
Externí odkaz:
https://doaj.org/article/98b0d7b6a3be4d628534af41f8919a19
Autor:
Wilfried Karel
This work is on the automated, photogrammetric orientation of World War II aerial reconnaissance images. For these near-nadir images, the footprint centers are known beforehand with an accuracy of a few hundred meters, together with coarse image scal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a2d4a31db4b1d4660bd7e854ae2ce7f
https://doi.org/10.5194/egusphere-egu23-17437
https://doi.org/10.5194/egusphere-egu23-17437
Autor:
Wilfried Karel, B. Wöhrer, Norbert Pfeifer, Johannes Otepka, Camillo Ressl, Gottfried Mandlburger
Publikováno v:
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol V-2-2021, Pp 35-42 (2021)
Modern data acquisition with active or passive photogrammetric imaging techniques generally results in 3D point clouds. Depending on the acquisition or processing method, the spacing of the individual points is either uniform or irregular. In the lat
Autor:
Camillo Ressl, Norbert Pfeifer, Markus Hollaus, Christian Ginzler, Livia Piermattei, Wilfried Karel, Mauro Marty, Markus Pöchtrager
Publikováno v:
International Journal of Applied Earth Observation and Geoinformation. 80:240-256
The landscape-human relationships on the Alps, the more populated mountain region globally, depend on tree species diversity, their canopy height and canopy gaps (soil cover). The monitoring of such forest information plays an important role in fores
Autor:
Sebastian Flöry, Gerhard Puercher, Andreas Bayr, Norbert Pfeifer, Camillo Ressl, Markus Hollaus, Wilfried Karel
Mountain regions are disproportionately affected by global warming and changing precipitation conditions. Especially the strong variations within high mountain ranges at the local scale require additional sources in order to quantify changes within t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::775cebbc07b27d3e7de83cafa9dfb727
https://doi.org/10.5194/egusphere-egu2020-22327
https://doi.org/10.5194/egusphere-egu2020-22327
Autor:
Camillo Ressl, Gerhard Puercher, Markus Hollaus, Livia Piermattei, Wilfried Karel, Norbert Pfeifer
After World War II, aerial photography i.e. vertical or oblique high-resolution aerial images spread rapidly into civil research sectors, such as landscape studies, geologic maps, natural sciences, archaeology, and more. Applying photogrammetric tech
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc35f5dbe0b6e57fa88c7da54c405622
https://doi.org/10.5194/egusphere-egu2020-22544
https://doi.org/10.5194/egusphere-egu2020-22544
Autor:
Hollaus, Livia Piermattei, Wilfried Karel, Di Wang, Martin Wieser, Martin Mokroš, Peter Surový, Milan Koreň, Julián Tomaštík, Norbert Pfeifer, Markus
Publikováno v:
Remote Sensing; Volume 11; Issue 8; Pages: 950
The measurements of tree attributes required for forest monitoring and management planning, e.g., National Forest Inventories, are derived by rather time-consuming field measurements on sample plots, using calipers and measurement tapes. Therefore, f
Publikováno v:
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol III-5, Pp 145-152 (2016)
Soil roughness represents fine-scale surface geometry which figures in many geophysical models. While static photogrammetric techniques (terrestrial images and laser scanning) have been recently proposed as a new source for deriving roughness heights