UC知道英语翻译（赏）
来源：百度知道 编辑：UC知道 时间：2024/06/16 06:31:44
3 ANALYSIS AND RESULTS
A multimodal distribution of population density within the United States (Figure 1) suggests that it is
possible to characterize rural, urban and suburban areas based on population density (Pozzi and Small,
2001). We consider suburban areas to be those with population densities between 100 and 10,000
people/km2.
Figure 1. Histogram of the Population Density for the U.S., showing also the distribution for Eastern
U.S. (East of the 90º W, black line) and Western U.S. (grey line).
To perform the study on the six cities, spatial and tabular data from the Census were initially
aggregated based on the block numeric codes for each county. The resulting vector layers were then
projected to UTM coordinates, rasterized to a 30 m grid and coregistered to the Landsat data. By
combining population density and vegetation fraction, we produced an “Urban Classification” for
each city (Figure 2). The same figure shows al
A multimodal distribution of population density within the United States (Figure 1) suggests that it is
possible to characterize rural, urban and suburban areas based on population density (Pozzi and Small,
2001). We consider suburban areas to be those with population densities between 100 and 10,000
people/km2.
Figure 1. Histogram of the Population Density for the U.S., showing also the distribution for Eastern
U.S. (East of the 90º W, black line) and Western U.S. (grey line).
To perform the study on the six cities, spatial and tabular data from the Census were initially
aggregated based on the block numeric codes for each county. The resulting vector layers were then
projected to UTM coordinates, rasterized to a 30 m grid and coregistered to the Landsat data. By
combining population density and vegetation fraction, we produced an “Urban Classification” for
each city (Figure 2). The same figure shows al
3 分析和结果 人口密度的multimodal 发行在美国范围内(图1) 建议它是 可能描绘农村, 都市和郊区根据人口密度(Pozzi 和小, 2001). 我们认为郊区那些以人口密度在100 和10,000 之间 people/km2 。图1 。人口密度的直方图为美国, 并且显示发行为东部 美国(在90º 东边; W, 黑线) 和西部美国(灰色线) 。 进行关于六个城市的研究, 空间和表格数据从人口调查最初地是 聚集根据块数字编码为各个县。收效的传染媒介层数然后是 射出对UTM 座标, rasterized 对一个30 m 栅格和coregistered 对陆地卫星数据。由 结合人口密度和植被分数, 我们导致了一个"都市分类" 为 各个城市(图2) 。同样图并且显示他们的二元人口分布作为作用 人口密度和植被分数。我们然后求和二元发行生产 人的少量的发行如同人口密度和植被的作用分成几部分为每个 城市。终于, 这些结果与三选择的USGS NLCD 组比较, 我们生产了 地区程度的发行各类作为人口密度和植被功能分成几部分 (图3) 。 植被和人口密度在美国。 图2 。人口和植被的空间发行。 在都市分类, 农村人口密度被显示在蓝色, 都市在红色和郊区 绿色。绿色不同的阴凉地对应于不同的相当数量植被。充分的决议图象 是可利用的在http://sedac.ciesin.columbia.edu/urban_rs.html 植被和人口密度在美国。 图3 。地区程度的发行各"开发了" USGS NLCD 组作为作用 人口密度和植被分数。绿色(最重的) 线代表LIR, 红色(重) 线 代表HIR 并且蓝色(稀薄的) 线代表CIR 。