Georgiadou Yola

Publications (3)0 Total impact

• Source

  Available from: Jan de Leeuw

  Article: An Assessment of the Accuracy of Volunteered Road Map Production in Western Kenya

  Jan de Leeuw, Said Mohammed, Ortegah Lapezoh, Nagda Sonal, Georgiadou Yola, DeBlois Mark
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  ABSTRACT: The introduction of web based mapping facilities that use satellite imagery, offers local people the possibility to map their environment. However, maps need to be accurate, which is the reason why map making is assigned to professionals. In this paper, we investigated the classification accuracy of road infrastructure from high resolution satellite imagery of an urban area in western Kenya achieved by surveyors and non-surveyors alike, with and without local knowledge. Those with local knowledge classified roads with over 92% accuracy on average, irrespective of surveying background. Professional surveyors and laymen without local knowledge achieved lower accuracies of 67.7% and 42.9% respectively. We argue that local knowledge is also likely to improve the classification accuracy of many other attributes featured in topographic maps and thus conclude that there is reason to consider engaging local expertise in the production and updating of topographic maps.
  Remote Sensing. 01/2011;
• Source

  Available from: Norman Kerle

  Article: The Function of Remote Sensing in Support of Environmental Policy

  Jan de Leeuw, Georgiadou Yola, Kerle Norman, Alfred de Gier, Inoue Yoshio, Ferwerda Jelle, Smies Maarten, Narantuya Davaa
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  ABSTRACT: Limited awareness of environmental remote sensing’s potential ability to support environmental policy development constrains the technology’s utilization. This paper reviews the potential of earth observation from the perspective of environmental policy. A literature review of “remote sensing and policy” revealed that while the number of publications in this field increased almost twice as rapidly as that of remote sensing literature as a whole (15.3 versus 8.8% yr−1), there is apparently little academic interest in the societal contribution of environmental remote sensing. This is because none of the more than 300 peer reviewed papers described actual policy support. This paper describes and discusses the potential, actual support, and limitations of earth observation with respect to supporting the various stages of environmental policy development. Examples are given of the use of remote sensing in problem identification and policy formulation, policy implementation, and policy control and evaluation. While initially, remote sensing contributed primarily to the identification of environmental problems and policy implementation, more recently, interest expanded to applications in policy control and evaluation. The paper concludes that the potential of earth observation to control and evaluate, and thus assess the efficiency and effectiveness of policy, offers the possibility of strengthening governance.
  Remote Sensing. 01/2010;
• Article: SDI ontology and implications for research in the developing world

  Georgiadou Yola
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  ABSTRACT: I examine key SDI concepts: ‘information’, ‘decision processes’, ‘people’, ‘management systems’, ‘social structure’ and ‘information technology’. I attempt to make explicit commonly held assumptions about the nature of these concepts, the ways they contribute to a ‘construction’ view of SDI implementation and their apparent disconnectedness with the realities in the developing world.I suggest alternative understandings of these key concepts that lead to a ‘cultivation’ perspective for SDI design and implementation. A ‘cultivation’ perspective is more likely to help us understand how human actors strike and sustain a dynamic balance between global uniformity and local contextual solutions in SDI design and implementation, especially in developing regions.
  International Journal of Spatial Data Infrastructures Research. 01/2006;