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Displaying 421 - 425 of 662Classification of Landsat images based on spectral and topographic variables for land-cover change detection in Zagros forests
Detection of land-cover changes through time can be complicated because of sensor-specific differences in spatial and spectral resolutions; classified land-cover changes can be due to either real changes on the ground or a switch in sensors used to collect data.
global land-cover validation data set, II: augmenting a stratified sampling design to estimate accuracy by region and land-cover class
A global validation database that can be used to assess the accuracy of multiple global and regional land-cover maps would yield significant cost savings and enhance comparisons of accuracy of different maps. Because the global validation database should expand over time as new validation data are contributed, the sampling design must be constructed so that it is simple to increase the sample size from a specific region (e.g. a continent or country) or from targeted land-cover classes to improve standard errors of the accuracy estimates.
Evaluating urban land cover change in the Hurghada area, Egypt, by using GIS and remote sensing
The rapid urban development in the Hurghada area since the 1980s has dramatically enhanced the potential impact of human activities. To inventory and monitor this urban development effectively, remote sensing provides a viable source of data from which updated land cover information can be extracted efficiently and cheaply.
Combining long-term land cover time series and field observations for spatially explicit predictions on changes in tropical forest biodiversity
Combining spatially explicit land cover data from remote-sensing and faunal data from field observations is increasingly applied for landscape-scale habitat and biodiversity assessments, but without modelling changes quantitatively over time. In a novel approach, we used a long-term time series including historical map data to predict the influence of one century of tropical forest change on keystone species or indicator groups in the Kakamega–Nandi forests, western Kenya.
Human Ecology of Regrowth in the Tropics
As the losses of tropical forests have accumulated over the past three decades, largely deforested areas have increased in extent in the tropics, and observers have begun to ask questions about the circumstances under which tropical forests reemerge in deforested areas. This article addresses these questions through a meta-analysis of 63 case studies of tropical forest cover change that report net regrowth in forests. Regrowth tends to occur in largely deforested highlands.