Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Markku Åkerblom"'
Autor:
Louise Terryn, Kim Calders, Markku Åkerblom, Harm Bartholomeus, Mathias Disney, Shaun Levick, Niall Origo, Pasi Raumonen, Hans Verbeeck
Publikováno v:
Methods in Ecology and Evolution, Vol 14, Iss 1, Pp 231-241 (2023)
Abstract Detailed 3D quantification of tree structure plays a crucial role in understanding tree‐ and plot‐level biophysical processes. Light detection and ranging (LiDAR) has led to a revolution in tree structural measurements and its 3D data ar
Externí odkaz:
https://doaj.org/article/5f1dc501520c4d0d8d85168dd27bbf10
Autor:
null Louise Terryn, null Kim Calders, null Markku Åkerblom, null Harm Bartholomeus, null Mathias Disney, null Shaun Levick, null Niall Origo, null Pasi Raumonen, null Hans Verbeeck
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::996212f0b3f0c73b773566c558b21977
https://doi.org/10.1111/2041-210x.14026/v2/response1
https://doi.org/10.1111/2041-210x.14026/v2/response1
Autor:
Aaron Smith, Rasmus Astrup, Pasi Raumonen, Jari Liski, Anssi Krooks, Sanna Kaasalainen, Markku Åkerblom, Mikko Kaasalainen
Publikováno v:
Forests, Vol 5, Iss 12, Pp 3274-3294 (2014)
The accurate characterization of three-dimensional (3D) root architecture, volume, and biomass is important for a wide variety of applications in forest ecology and to better understand tree and soil stability. Technological advancements have led to
Externí odkaz:
https://doaj.org/article/9e75a13a580445c3add0ad3397676f26
Autor:
Mathias Disney, Markus Holopainen, Mikko Vastaranta, Harri Kaartinen, Sanna Kaasalainen, Markku Åkerblom, Mikko Kaasalainen, Pasi Raumonen, Philip Lewis
Publikováno v:
Remote Sensing, Vol 5, Iss 2, Pp 491-520 (2013)
This paper presents a new method for constructing quickly and automatically precision tree models from point clouds of the trunk and branches obtained by terrestrial laser scanning. The input of the method is a point cloud of a single tree scanned fr
Externí odkaz:
https://doaj.org/article/9f3bf170c625403bbf371da6ed077c39
Autor:
Jing Liu, Longhui Li, Marco Heurich, Xi Zhu, Markku Åkerblom, Andrew K. Skidmore, Tiejun Wang
Publikováno v:
Remote Sensing, Vol 13, Iss 3325, p 3325 (2021)
Remote sensing, 13(16):3325. MDPI
Remote Sensing; Volume 13; Issue 16; Pages: 3325
Remote sensing, 13(16):3325. MDPI
Remote Sensing; Volume 13; Issue 16; Pages: 3325
The in situ leaf area index (LAI) measurement plays a vital role in calibrating and validating satellite LAI products. Digital hemispherical photography (DHP) is a widely used in situ forest LAI measurement method. There have been many software progr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb196032fcf73b24d2ae983f8e38d61a
https://trepo.tuni.fi/handle/10024/134206
https://trepo.tuni.fi/handle/10024/134206
Publikováno v:
3D Tree Models for Forest Dynamics
3D Tree Models for Forest Dynamics, Jan 2020, Helsinki, Finland
HAL
3D Tree Models for Forest Dynamics, Jan 2020, Helsinki, Finland
HAL
International audience; The above ground volume (AGV) measurement of a sampled tree is a fundamental input to provide predictions of forest, woodland and urban resources, but it is generally biased by country-specific merchantable thresholds. Terrest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::92894207147052608f70ddb8d1612bee
https://inria.hal.science/hal-02374414
https://inria.hal.science/hal-02374414
Autor:
Zbyněk Malenovský, Matti Mõttus, Weiwei Liu, Albert Porcar-Castell, Jean-Philippe Gastellu-Etchegorry, Jon Atherton, Markku Åkerblom, Pasi Raumonen, Raisa Mäkipää
Publikováno v:
Liu, W, Atherton, J, Mõttus, M, Gastellu-Etchegorry, J P, Malenovský, Z, Raumonen, P, Åkerblom, M, Mäkipää, R & Porcar-Castell, A 2019, ' Simulating solar-induced chlorophyll fluorescence in a boreal forest stand reconstructed from terrestrial laser scanning measurements ', Remote Sensing of Environment, vol. 232, 111274 . https://doi.org/10.1016/j.rse.2019.111274
Solar-induced chlorophyll fluorescence (SIF) has been shown to be a suitable remote sensing proxy of photosynthesis at multiple scales. However, the relationship between fluorescence and photosynthesis observed at the leaf level cannot be directly ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f781b4f712e1ec494b29188e479a15a4
http://hdl.handle.net/10138/308925
http://hdl.handle.net/10138/308925
Autor:
Markku Åkerblom, Joanne Nightingale, Yadvinder Malhi, Philip Lewis, Pasi Raumonen, Mathias Disney, Niall Origo, Kim Calders, Andrew Burt
Publikováno v:
Remote Sensing; Volume 10; Issue 6; Pages: 933
REMOTE SENSING
REMOTE SENSING
Forest biophysical variables derived from remote sensing observations are vital for climate research. The combination of structurally and radiometrically accurate 3D "virtual" forests with radiative transfer (RT) models creates a powerful tool to fac
Autor:
Mathias Disney, Eric Casella, F. M. Danson, Mikko Kaasalainen, Lucy A. Schofield, Pasi Raumonen, Rachel Gaulton, Markku Åkerblom
Publikováno v:
Interface Focus
Journal of the Royal Society Interface Focus
Journal of the Royal Society Interface Focus
We present an algorithm and an implementation to insert broadleaves or needleleaves into a quantitative structure model according to an arbitrary distribution, and a data structure to store the required information efficiently. A structure model cont
Publikováno v:
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol II-3/W4, Pp 189-196 (2015)
Proceedings of the ISPRS Annals
Proceedings of the ISPRS Annals
This paper presents a method for reconstructing automatically the quantitative structure model of every tree in a forest plot from terrestrial laser scanner data. A new feature is the automatic extraction of individual trees from the point cloud. The