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A simple assessment of the expansion of American urban areas from 1970s to 1990s using the North American Landscape characterization data set

机译：使用北美景观特征数据集简单评估1970年代至1990年代美国城市地区的扩张

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The triplicates of the North American Landscape Characterization (NALC) data set are used to assess the expansion of 10 large urban areas in the United States in two time periods since 1970s. For each of the ten cities, an image window covering the city is selected from the corresponding triplicate. For each site, a decision tree classifier is applied to classify the urban, suburban developed/residential areas from the other land use (the undevelopedon-residential areas) for the three dates, and to detect the areas changed from vegetatedon-residential areas to developed/residential land surface types in the two time periods (from date 1 to date 2 and from date 2 to date 3). The classification maps are then examined and adjusted for accuracy using visual inspection of the images and the available ancillary maps. The adjusted maps are then used to calculate the percentage increases of the urban and suburban areas. The calculated percentages indicate that cities in western United States were experiencing faster expansion than cities in the eastern US. The increase of residential areas in the time period from 1973 to 1986 ranges from 93% for Las Vegas, NV to only 5% for Washington, DC. In the time period from 1986 to 1991, the increase spreads from more than 37% for Las Vegas, NV to only 3% for Washington, DC again. When percentage increases of the developed/residential areas are plotted against population of the city, significant linear relationships are found for most of the 10 cities.
机译：北美景观特征（NALC）数据集的一式三份用于评估自1970年代以来的两个时期内美国10个大型城市区域的扩张。对于十个城市中的每个城市，从相应的一式三份中选择覆盖该城市的图像窗口。对于每个站点，应用决策树分类器对三个日期的其他土地用途（未开发/非住宅区）中的城市，郊区发达/住宅区进行分类，并检测从植被/非住宅区变化的区域在两个时间段内（从日期1到日期2，从日期2到日期3）居住区到已开发/居住的地表类型。然后使用图像的视觉检查和可用的辅助图检查分类图并调整其准确性。然后，将调整后的地图用于计算城市和郊区的百分比增长。计算出的百分比表明，美国西部城市的扩张速度快于美国东部城市。从1973年到1986年，居住面积的增长范围从内华达州拉斯维加斯的93％到华盛顿特区的5％。在1986年至1991年这段时间里，增长幅度再次从内华达州拉斯维加斯的37％以上扩大到华盛顿特区的3％。将发达/居住区的增长百分比与城市人口作图，可以发现10个城市中的大多数具有显着的线性关系。

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