Blar i Brage NMBU på forfatter "Ørka, Hans Ole"
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Mapping forest key habitats using machine learning and remote sensing data
Pedersen, Jon Hidle (Master thesis, 2019)The Norwegian forest habitat inventory (Miljøregistrering i skog, MiS), is a system used to classify different forest key habitats for use in forestry planning. The purpose of the system is to localize and map habitats ... -
Methods for estimation of major forest attributes based on remotely sensed data for the support of REDD+ measurement, reporting and verification (MRV)
Berie, Habitamu Taddese (PhD Thesis;2021:20, Doctoral thesis, 2021)There is limited information about the status of forest resources in Ethiopia. The available reports based on field sampling are inconsistent and lack precision due to limited sample sizes. Remotely sensed data, which cover ... -
Modelling and estimating tree and forest resources of the Dry Afromontane forests in South-central Ethiopia using field and remotely sensed data
Kutie, Zerihun Asrat (PhD Thesis;2020:58, Doctoral thesis, 2020)For effective forest management missions, the presence of accurate information about the forest resources is indispensable. However, the absence of such relevant information for most natural forests in Ethiopia have been ... -
Nasjonal overvåking av hule eiker : resultat andre omløp
Hatlevoll, Kristina; Burner, Ryan; Ørka, Hans Ole; Arnott, David; Lunde, Lisa Fagerli; Evju, Marianne; Birkemoe, Tone; Sverdrup-Thygeson, Anne (MINA fagrapport;62, Report, 2019)Hule eiker utgjør viktige hotspothabitater for en rekke arter i Norge. Eik er det viktigste hulromsdannende treet i Norge og i 2011 ble treslaget vedtatt som utvalgt naturtype (Lovdata 2011). Dette ledet til oppstarten av ... -
UAV-Based Hyperspectral Imagery for Detection of Root, Butt, and Stem Rot in Norway Spruce
Allen, Benjamin James; Dalponte, Michele; Ørka, Hans Ole; Næsset, Erik; Puliti, Stefano; Astrup, Rasmus Andreas; Gobakken, Terje (Peer reviewed; Journal article, 2022)Numerous species of pathogenic wood decay fungi, including members of the genera Heterobasidion and Armillaria, exist in forests in the northern hemisphere. Detection of these fungi through field surveys is often difficult ... -
Use of remote sensing for mapping of non-native conifer species
Ørka, Hans Ole; Hauglin, Marius (MINA fagrapport;33, Report, 2016)Non-native species are by many considered a threat to local biodiversity. In Norway, conifer species have been introduced in order to find species with better timber production than the native species. Several of these ... -
Use of remotely sensed data to enhance estimation of aboveground biomass for the dry afromontane forest in south-central Ethiopia
Taddese, Habitamu; Asrat, Zerihun; Burud, Ingunn; Gobakken, Terje; Ørka, Hans Ole; Dick, Øystein B.; Næsset, Erik (Peer reviewed; Journal article, 2020)Periodic assessment of forest aboveground biomass (AGB) is essential to regulate the impacts of the changing climate. However, AGB estimation using field-based sample survey (FBSS) has limited precision due to cost and ...