02 Contents Frame
Land evaluation using earth observation
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40 2019 ND-CP 413905
- Điều hướng trang này:
- THE CHALLENGE FOR THE FUTURE
| Land evaluation using earth observation
Continual technical advances in Earth observation have provided new environmental data sources and techniques to upgrade spatial information on land cover (Campbell 1996) and to monitor changes due to human activity from a biophysical perspective (Turner 1997; Wear and Bolstad 1998). Remote sensing, including aerial photography and satellite imagery, has great advantages in regions lacking qualitative and quantitative information on land cover such as in Africa (Thenkabail and Nolte 1996; FAO 1997a) and in areas undergoing rapid changes (Lambin 1996; Fuller 1998; Foody and Boyd 1999; Imbernon 1999). In landscape ecology, multivariate statistics have greatly improved classification algorithms and aided landscape pattern analysis (Mather 1995), and models have been developed to predict both spatial and temporal land cover changes (Turner and Gardner 1991; Lambin 1997). Many of these newer techniques are discussed in the following chapters. THE CHALLENGE FOR THE FUTURE The challenge in most land resources applications remains to integrate people-centred approaches, biophysical methods and environmental issues and to attain a balance between production management and conservation of land resources for future use. Whereas stakeholder participation receives increasingly more attention in planning land resources management, recent developments in spatial analysis and landscape ecology have much to offer in understanding underlying linkages between land resources and local management, and in monitoring whether the management is sustainable. A methodology combining biophysical surveying and spatial modelling with participatory methods needs to be developed in order to incorporate local knowledge and environmental concerns into land evaluation and land resources models. |