Fig. 2: National urban land expansion in the middle of the road scenario. a Global quintile map of urban land expansion rate (%) 2000–2100. b Global quintile map of per capita urban land area (m2) in 2100 (this variable in 2000 is shown in Supplementary Fig. 1). (Source data are...
Basing on it to extract the Urban Area Map of Kunming by binarization in 1992 and 2002,and overlay the two map to generate 1992-2002 Kunming City urban expansion map.The result of calculating the area in 1992 and 2002 is 193.16 km2 and 258.09 km2.The annual average expanding rate is 3.36...
ruralbuilt-upareasfromthismap. FIGURE3.2: Thebuilt-upareawithinthestudyareaofAddisAbaba,Ethiopia,in1986differentiatedintourban(darkred), suburban(red)andrural(ochre)pixels. Clearly,acitycontainsnotonlybuilt-upareasbutopenspacesinandaroundthemaswell.Both ...
Yet, few studies have comprehensively investigated impacts of urban expansion on natural dryland habitats globally even though these cover 40% of global land area and provide habitats for 28% of endangered species. Here, we quantify at multiple scales the loss of habitat quality directly and ...
Since the first three principal components can effectively represent the variance in the original data, they were selected as the input of change vector analysis (CVA) to obtain the change intensity map. Furthermore, the study area was divided into rectangular grids with a 0.25° side length. ...
Between the late 1980s and 2008, the total urban expansion in the mainland of China was 2.645 × 104 km2, resulting in an annual urban expansion area of about 1322.7 km2/yr, with the UEr of 111.9%. This study also finds that there has been an obvious spatial gradient of urbanization ...
Population Exposure to PM2.5 in the Urban Area of Beijing The air quality in Beijing, especially its PM2.5level, has become of increasing public concern because of its importance and sensitivity related to health ... A Zhang,QW Qi,LL Jiang,... - 《Plos One》 被引量: 134发表: 2013年 ...
if its estimated urban land demand is smaller than its total area of the already built-up, then no changes are simulated for this region, and the spatial extent of existing urban land also remains unchanged. Subsequently, for regions experiencing a decline in urban land demand, we assess their...
In addition, many abandoned mined land has been reclaimed and utilized as the closure of various mines, which also provided the area with the impetus for rapid urban expansion32. Figure 1 Location of the study area (the map was created by the author using the software ArcGIS 10.5, www....
In addition, we calculated the expansion pattern every two years, considering the urban expansion rate and computational cost. 3. Results and discussions 3.1 Global impervious surface area (GISA) mapping As seen from the right column of Table 1, using the validation points from the 270 cities,...