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Wyświetlanie 1-2 z 2
Tytuł:
Terrestrial laser scanning in inventory control of wildlife in a municipal park in Wrocław
Autorzy:
Klemiński, Eryk
Kasza, Damian
Powiązania:
https://bibliotekanauki.pl/articles/24201195.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
tree inventory
laser scanning
3D modelling
inwentaryzacja drzew
skanowanie laserowe
modelowanie 3D
Opis:
The article presents the results of an experiment related to wildlife inventory control with the use of data from terrestrial laser scanning. The measurements were performed with the terrestrial laser scanning system – Riegl VZ-400i. The study area was the Obrońców Westerplatte square in Wrocław. The collected measurement data were pre-processed in a commercial – dedicated RiSCAN Pro environment. Operations related to point cloud georeferencing and its filtering were performed. The tree parameters were measured on the basis of a cloud point obtained in field surveys. This operation was performed with the use of the 3D Forest software. The investigations covered the main parameters of the tree (height and diameter) along with additional parameters, such as the distance between two points of the tree located furthest apart, the surface area of the orthogonal projection of the tree on the reference surface (terrain surface) and the height of the tree crown above the terrain surface. As a result of the performed analyses, an inventory of 70 trees was made within the Obrońców Westerplatte square in Wrocław. Part of the experiment was also to prepare a 3D model of a tree by using some available modeling algorithms. This part was performed in Sequoia software - dedicated to such operations. The software offers three modeling algorithms: Zhu/Bridson, metaballs and union of spheres.
Źródło:
Geomatics, Landmanagement and Landscape; 2023, 2; 57--79
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selection of optimal tree top detection parameters in a context of effective forest management
Autorzy:
Kolendo, Łukasz
Ksepko, Marek
Powiązania:
https://bibliotekanauki.pl/articles/96315.pdf
Data publikacji:
2019
Wydawca:
Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
Tematy:
ALS
inwentaryzacja lasu
wykrywanie wierzchołków drzew
parametry segmentacji korony
forest inventory
treetop detections
crown segmentation parameters
Opis:
In the process of tree stand parameter estimation based on data from airborne laser scanning ALS, the detection of a single tree is an important starting point. The aim of this work is to develop optimal values of parameters in the process of detection of tops and segmentation of stands on the basis of ALS data analysis. The research was carried out on the basis of ALS data from raids carried out in 2007 and 2017 on a fragment of the Zajma forest district in the Zednia forest inspectorate (north-eastern Poland). Parameters analyzed included: Ground Sampling Distance [m], the level of smoothing of the Canopy Height Model (CHM) with the Gaussian filter (the size of the moving window, the value of standard deviation), the filtration of the output point cloud, as well as the application of the additional interpolation algorithm CHM based on the analysis of raster cells neighborhood. The research has shown that it is possible to indicate detection parameters that ensure a very high correlation between the number of automatically detected treetops and the number of trunks found during fieldwork. Importantly, the optimal detection parameters developed for remote-sensing materials from the years 2007 and 2017 differ slightly, which ensures generally high accuracy of ALS data and the possibility of implementing the values of these parameters in other research objects.
Źródło:
Ekonomia i Środowisko; 2019, 1; 67-85
0867-8898
Pojawia się w:
Ekonomia i Środowisko
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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