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首页> 外文会议>The 28th International Symposium on Remote Sensing of Environment, Mar 27-31, 2000, Cape Town, South Africa >Assessing the Impacts of Land-Use in Six African Cities
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Assessing the Impacts of Land-Use in Six African Cities

机译：评估六个非洲城市土地利用的影响

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摘要

This study utilized multitemporal SPOT XS and PAN data to assess the impacts of urban land cover/use change in six cities located in semi-arid regions of Africa. They include Marrakech (Morocco), Dakar (Senegal), Bamako (Mali), Niamey (Niger), Dodoma (Tanzania), and Gaborone (Botswana) The analysis used false color composites for all six cities and classification comparison to highlight changes that resulted from their rapid spatial expansion as a result of economic growth and rapid population increase. The false color composites (FCCs) were produced for visual change detection. The classifications were used for detailed quantitative change analysis. The results showed that all six cities have spatially expanded. However, Gaborone was found to have the highest change rate. For this reason, the study focused on it for detailed change analysis through classification comparison. As expected, the FCCs showed that all six cities have low internal variability due to similarities between construction materials and the natural landscape. The results of the classification comparison show that the built-up area of Gaborone has expanded by 143% and is encroaching over agricultural and pastoral lands and other natural land covers.
机译：这项研究利用多时间SPOT XS和PAN​​数据评估了非洲半干旱地区六个城市的城市土地覆盖/用途变化的影响。其中包括马拉喀什（摩洛哥），达喀尔（塞内加尔），巴马科（马里），尼亚美（尼日尔），多多马（坦桑尼亚）和哈博罗内（博茨瓦纳）。分析对所有六个城市使用了虚假的颜色组合，并进行了分类比较以突出显示导致变化的变化是由于经济增长和人口迅速增长而导致的空间快速扩张。产生假色复合物（FCC）用于视觉变化检测。这些分类用于详细的定量变化分析。结果表明，所有六个城市的空间都在扩大。但是，发现哈博罗内的变化率最高。因此，本研究集中在通过分类比较进行详细的变更分析。正如预期的那样，FCC显示，由于建筑材料和自然景观之间的相似性，所有六个城市的内部变异性都较低。分类比较的结果表明，哈博罗内的建成区面积扩大了143％，并且正在侵蚀农牧业土地和其他自然土地覆盖。

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