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Browsing by Author "Cho, Moses A"

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Analysis of spatio-temporal rainfall trends across southern African biomes between 1981 and 2016

Author: Marumbwa, FM ; Cho, Moses A ; Chirwa, PW Date: Dec 2019 Southern African biomes experience significant changes in the distribution of rainfall that are linked to El Niño–Southern Oscillation. As such, an understanding of the spatio-temporal rainfall trends is key in predicting rainfall patterns ... Read more
Assessing degradation across a land-use gradient in the Kruger National Park area using advanced remote sensing modalities

Author: Van Aardt, JAN ; Mathieu, Renaud SA ; Cho, Moses A ; Wessels, Konrad J ; Erasmus, B ; Asner, GP ; Smit, IPJ Date: 2011 Land degradation is regarded as one of the most important environmental issues facing sub-Saharan Africa and is especially relevant in the former communal ‘homeland’ areas of South Africa. Although it has been a topic of intense research, ... Read more
Assessing leaf spectral properties of Phragmites australis impacted by acid mine drainage

Author: Van Deventer, Heidi ; Cho, Moses A Date: Jul 2014 The decanting of acid mine drainage (AMD) from the Western Basin on the Witwatersrand in late 2010 raised concerns about AMD risks in other gold, coal and copper mining areas of South Africa. Field spectroscopy and the use of vegetation indices ... Read more
Assessing the effect of seasonality on leaf and canopy spectra for the discrimination of an alien tree species, Acacia Mearnsii, from co-occurring native species using parametric and nonparametric classifiers

Author: Masemola, Cecilia R ; Cho, Moses A ; Ramoelo, Abel Date: Aug 2019 The tree Acacia mearnsii is native to south-eastern Australia but has become an aggressive invader in many countries. In South Africa, it is a significant threat to the conservation of biomes. Detecting and mapping its early invasion is ... Read more
Assessing the effects of subtropical forest fragmentation on leaf nitrogen distribution using remote sensing data

Author: Cho, Moses A ; Ramoelo, Abel ; Debba, Pravesh ; Mutanga, O ; Mathieu, Renaud SA ; Van Deventer, Heidi ; Ndlovu, N Date: Oct 2013 Subtropical forest loss resulting from conversion of forest to other land-cover types such as grassland, secondary forest, subsistence crop farms and small forest patches affects leaf nitrogen (N) stocks in the landscape. This study explores ... Read more
Assessing the utility WorldView-2 imagery for tree species mapping in a South African subtropical forest patch and the conservation implications: Dukuduku forest patch as case study

Author: Cho, Moses A ; Malahlela, O ; Ramoelo, Abel Date: Jun 2015 Indigenous forest biome in South Africa is highly fragmented into patches of various sizes (most patches < 1 km (sup20). The utilization of timber and non-timber resources by poor rural communities living around protected forest patches produce ... Read more
An assessment of remote sensing-based drought index over different land cover types in southern Africa

Author: Marumbwa, FM ; Cho, Moses A ; Chirwa, PW Date: Jul 2020 An understanding of drought and land cover interaction plays a crucial role in vegetation vulnerability studies and land use planning. However, there is paucity of information on drought, land cover and land use interaction in southern Africa. ... Read more
Classification of savanna tree species, in the Greater Kruger National Park region, by integrating hyperspectral and LiDAR data in a random forest data mining environment

Author: Naidoo, Laven ; Cho, Moses A ; Mathieu, Renaud SA ; Asner, G Date: Apr 2012 The accurate classification and mapping of individual trees at species level in the savanna ecosystem can provide numerous benefits for the managerial authorities. Such benefits include the mapping of economically useful tree species, which ... Read more
Combining binary classifiers to improve tree species discrimination at leaf level

Author: Dastile, X ; Jäger, G ; Debba, Pravesh ; Cho, Moses A Date: Nov 2012 This paper focuses on the discrimination of seven different savannah tree species at leaf level using hyperspectral data. The data is small in size, high-dimensional and shows large within-species variability combined with small between species ... Read more
Comparing parametric and non-parametric classifiers for remote sensing of tree species across a land use gradient in a Savanna landscape

Author: Cho, Moses A ; Naidoo, Laven ; Mathieu, Renaud SA ; Asner, GP ; Ramoelo, Abel Date: Nov 2012 Several classification techniques have been used to map vegetation communities or land cover types using remote sensing data including maximum likelihood (ML), discriminant analysis and spectral angle mapper classifiers. ML classifier is a ... Read more
Comparison between sensors with different spectral resolutions, relative to the sumbandila satellite, for assessing site quality differences, in eucalyptus grandis plantations

Author: Main, Russell S ; Cho, Moses A ; Van Aardt, J ; Majeke, B Date: Oct 2008 The majority of earth observation studies have for years made use of data from multispectral spaceborne sensors. More recently though, both airborne and spaceborne narrowband hyperspectral sensors have come to the fore and are able to provide ... Read more
Comparison of Landsat 8 OLI and Landsat 7 ETM+ for estimating grassland LAI using model inversion and spectral indices: case study of Mpumalanga, South Africa

Author: Masemola, Cecilia ; Cho, Moses A ; Ramoelo, Abel Date: Jun 2016 The leaf area index (LAI) is the key biophysical indicator used to assess the condition of rangeland. In this study, we investigated the implications of narrow spectral response, high radiometric resolution (12 bits), and higher signal-to-noise ... Read more
Comparison of two remote sensing models for estimating evapotranspiration: algorithm evaluation and application in seasonally arid ecosystems in South Africa

Author: Dzikiti, Sebinasi ; Jovanovic, Nebojsa ; Bugan, Richard DH ; Ramoelo, Abel ; Majozi, Nobuhle P ; Nickless, Alecia ; Cho, Moses A ; Le Maitre, David C ; Ntshidi, Zanele ; Pienaar, Harrison H Date: Sep 2019 Remote sensing tools are becoming increasingly important for providing spatial information on water use by different ecosystems. Despite significant advances in remote sensing based evapotranspiration (ET) models in recent years, important ... Read more
Determining the wetland-dryland boundary of depressions using littoral gradient analysis of soil edaphic factors

Author: Nondlazi, Basanda X ; Cho, Moses A ; Van Deventer, Heidi ; Sieben, EJ Date: Aug 2021 Depressional wetlands are highly vulnerable to changes in land surface temperature and rainfall but little is known about their responses to future climate change. This study assessed the variation in edaphic factors between wetlands and along ... Read more
Distinguishing tree species from in situ hyperspectral and temporal measurements through ensemble statistical learning

Author: Dudeni-Tlhone, Nontembeko ; Mutanga, O ; Debba, Pravesh ; Cho, Moses A Date: Aug 2023 Hyperspectral sensors capture and compute spectral reflectance of objects over many wavelength bands, resulting in a high-dimensional space with enough information to differentiate between spectrally similar objects. Due to the curse of ... Read more
Do seasonal profiles of foliar pigments improve species discrimination of evergreen coastal tree species in KwaZulu- Natal, South Africa?

Author: Van Deventer, Heidi ; Cho, Moses A ; Mutanga, O Date: Apr 2013 Studies in the Northern hemisphere have shown the potential of foliar pigment seasonal profiles as a means of improving species discrimination. Remote sensing vegetation indices have been used to optimise absorption features presented by ... Read more
Dry season biomass estimation as an indicator of rangeland quantity using multi-scale remote sensing data

Author: Ramoelo, Abel ; Cho, Moses A Date: Oct 2014 For grazing, biomass is the main indicator of rangeland quantity, which is crucial to determine the amount of food available for animals (grazers), including livestock. Livestock production in the rural communities of the world, including ... Read more
Earth Observation for Biodiversity Assessment (EO-BA)

Author: Cho, Moses A ; Debba, Pravesh ; Mathieu, Renaud SA ; Ramoelo, Abel ; Naidoo, Laven ; Van Deventer, Heidi ; Malahlela, O ; Mathieu, Renaud SA Date: Oct 2012 The Earth Observation for Biodiversity Assessment (EO-BA) programme is designed to enhance biodiversity assessment and conservation through the application of earth observation data, with particular focus on the African continent. Read more
Earth observation for rangeland monitoring

Author: Ramoelo, Abel ; Cho, Moses A ; Mathieu, Renaud SA Date: Oct 2012 The emergence of high resolution multispectral sensors with red-edge information such as, WorldView-2, RapidEye, Sentinel-2 (to be launched in 2013) and SumbandilaSAT moves remote sensing towards routine monitoring of rangeland resource quality. Read more
Estimating grass nutrients and biomass as an indicator of rangeland (forage) quality and quantity using remote sensing in Savanna ecosystems

Author: Ramoelo, Abel ; Cho, Moses A ; Mathieu, Renaud SA ; Skidmore, AK ; Schlerf, M ; Heitkönig, IMA Date: Oct 2012 Grass quality and quantity information plays a crucial role in understanding the distribution, densities and population dynamics of herbivores (i.e. livestock and wildlife). Leaf nitrogen (N) and biomass (g/ m2) are indicators of grass quality ... Read more

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