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Displaying 256 - 260 of 662On the novel use of model-based decomposition in SAR polarimetry for target detection on the sea
In this study, we show the novel applications of model-based scattering power decomposition analyses in synthetic aperture radar (SAR) polarimetry for man-made target detection on the sea surface. Model-based decomposition technique is primarily used for land-cover classification mainly because microwave scattering from land is composed of various scattering mechanisms.
good shepherd: remedying the fencing syndrome
In this paper the use of fenced grazing camps to manage the rangeland commons is challenged. A historical perspective is presented on fencing and rotational grazing in South Africa. Two case studies in KwaZulu-Natal and the Northern Cape illustrate the factors that influence the management of rangelands under communal land tenure without the use of fences. It is argued that herding is preferred over fencing.
Kernel-based extreme learning machine for remote-sensing image classification
This letter evaluates the effectiveness of a new kernel-based extreme learning machine (ELM) algorithm for a land cover classification using both multi- and hyperspectral remote-sensing data. The results are compared with the most widely used algorithms – support vector machines (SVMs). The results are compared in terms of the ease of use (in terms of the number of user-defined parameters), classification accuracy and computation cost.
Reshaping women's land rights on communal rangeland
This paper aims to contribute to the debates on communal rangelands and analyses the gendered dimension of land rights and land access in the rural areas of Namaqualand. The actual gender relations within rural communities and the emergence of strategies that are being pursued in communal land processes are obscured and often ignored in policies about communal rangelands, which overemphasise ‘the ecological and economic impact’ and the balancing of these dimensions.
Municipal commonage in South Africa: a critique of artificial dichotomies in policy debates on agriculture
The paper critiques Vetter's (in this issue) assertion that commercialisation of smallholder agriculture holds dangers for sustainable rangeland management. The paper argues that a range of policy options are required, including commercialisation and subsistence farming, large-scale and smallholder farming, a range of land tenure options, rural and peri-urban farming, and part-time farming. The case of municipal commonage land is useful to show the effectiveness of a flexible range of policy options regarding land ownership, farming scale and the social nature of farming.