Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Ali Asghar Darvishsefat"'
Autor:
Vahid Nasiri, Mirela Beloiu, Ali Asghar Darvishsefat, Verena C. Griess, Carmen Maftei, Lars T. Waser
Publikováno v:
International Journal of Applied Earth Observations and Geoinformation, Vol 116, Iss , Pp 103154- (2023)
The tree species composition (TSC) reflects a forest's tree species diversity and is relevant for forest planning, biodiversity conservation, and forest resources management. Yet, accurate information on tree species composition at landscape scale is
Externí odkaz:
https://doaj.org/article/603b788883b9416b9c9186ad6d170911
Publikováno v:
مجله جنگل ایران, Vol 12, Iss 1, Pp 131-145 (2020)
Orthphoto mosaic, and digital elevation models (DEMs) that created from UAV imagery can be used to delineate tree crowns. The goal of this research is to compare two segmentation techniques in the estimation of crown diameter. In this regard, two suc
Externí odkaz:
https://doaj.org/article/0b2fa26fae3a4e9992c4ec67482f0a82
Autor:
Vahid Nasiri, Ali Asghar Darvishsefat, Hossein Arefi, Verena C. Griess, Seyed Mohammad Moein Sadeghi, Stelian Alexandru Borz
Publikováno v:
Remote Sensing, Vol 14, Iss 6, p 1453 (2022)
Forest canopy cover (FCC) is an important ecological parameter of forest ecosystems, and is correlated with forest characteristics, including plant growth, regeneration, biodiversity, light regimes, and hydrological properties. Here, we present an ap
Externí odkaz:
https://doaj.org/article/4145876fecfa4c60a44b8d7ef9d97569
Autor:
Fardin Moradi, Ali Asghar Darvishsefat, Manizheh Rajab Pourrahmati, Azade Deljouei, Stelian Alexandru Borz
Publikováno v:
Forests, Vol 13, Iss 1, p 104 (2022)
Due to the challenges brought by field measurements to estimate the aboveground biomass (AGB), such as the remote locations and difficulties in walking in these areas, more accurate and cost-effective methods are required, by the use of remote sensin
Externí odkaz:
https://doaj.org/article/ee45c41f1a4c475bb8f6d429ca188d7d
Autor:
Remazan Ali Khorrami, Ali Asghar Darvishsefat, Masoud Tabari Kochaksaraei, Shaban Shataee Jouibary
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 23, Iss 2, Pp 269-278 (2015)
In this research, the possibility of application of LiDAR-derived characteristics has been studied for discrimination amongst common hornbeam (Carpinus betulus) and Persian maple (Acer velutinum) trees. LiDAR data of individual sample trees were sepa
Externí odkaz:
https://doaj.org/article/c21d96e3f40b447f88213a10d836d0c9
Autor:
Manijeh Rajabpour Rahmati, Ali Asghar Darvishsefat, Nicholas Baghdadi, Manouchehr Namiranian, Hamid Soofi Mariv
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 23, Iss 1, Pp 90-103 (2015)
Forest canopy height is an important input variable to derive a set of essential parameters of forest stands, which is yet costly and time consuming when measured based on ground surveys. The satellite-based laser scanner data from ICESat-GLAS provid
Externí odkaz:
https://doaj.org/article/081aa230ac624c0489870ce6e89a72af
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 22, Iss 3, Pp 392-401 (2014)
To investigate the capability of satellite imagery to map poplar plantations, IRS-P6-LISSIII and IRS-P6-LISSIV scenes from 2007 as well as Landsat TM scenes from 2009 and 2011 were analyzed over Sowme`eh Sara region in Guilan province. The IRS-P6-LIS
Externí odkaz:
https://doaj.org/article/bd553e4536ec4fc88aac32a1a5cc02d8
Autor:
Omid Refieyan, Ali Asghar Darvishsefat
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 22, Iss 1, Pp 121-132 (2014)
The optimal computational capability for analyzing multispectral aerial images e.g. for fine-scale tree species mapping is often considerably constrained by their enormous data volume. This may be mainly reflected in a reduction in the speed of data
Externí odkaz:
https://doaj.org/article/fc067c837c0b42b8a9e2b65fea6cd52c
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 18, Iss 1, Pp 142-132 (2010)
In order to investigate the capability of SPOT5-HRG data for forest density mapping in Caspian forests, the data of this sensor with 5 and 10 spatial resolutions dated 2002 were analyzed. The study area with 10000 ha is located in south western of Am
Externí odkaz:
https://doaj.org/article/e9ebc0f4caeb4121b42eb92308ed189d
Autor:
Mojgan Abbasi, Ali Asghar Darvishsefat, Michael Elrt Schaepman, Mohammad Reza Marvie Mohadjer, Hooshang Sobhany
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 17, Iss 4, Pp 580-568 (2009)
Remote sensing systems especially hyperspectral remote sensing for recognizing tree species and mapping forest type requires fundamental knowledge of spectral reflectance of desired tree species. A field of remote sensing named field spectrometry dea
Externí odkaz:
https://doaj.org/article/a26acbf3fd19498cb530081d673b6be1