Health Physics Division, Oak Ridge National Laboratory, 37830, Oak Ridge, Tennessee.
Demography. 1974 May;11(2):321-36. doi: 10.2307/2060566.
The Bureau of the Census listing of geographical coordinates of centroids of all enumeration districts together with population counts from the U. S. 1970 Census of Population was used to contruct via computer five nationwide geographical grids of population density with sector dimensions of 0.01, 0.02, 0.04, 0.1, and 0.25 degrees of latitude and longitude. The entire population of a district was assigned to a grid sector if the coordinates of the district centroid fell within the boundaries of the sector. The sectors were then rank-ordered according to population density, and listings were made of sector population, population density, geographical location, cumulative population, area of sector, and cumulative area. The five sets of data were synthesized into single equations describing population as a function of density in one case and of area in another. From these data it was found, for example, that about 800,000 people live in 19 sectors of 0.01-degree dimensions with a population density of 100,000 people per square mile or greater (nearly all in Manhattan); about 10 million live in 183 sectors of 0.02-degree dimensions with a population density of 23,000 per square mile or greater; and about half of the total U. S. population, that is, about 100 million people, reside within about 0.6 percent of the area of the United States, that is, within 20,000 square miles.Four representative displays of population density are shown for the Northeast Corridor, including isometric views and a contour map.
人口普查局将所有普查区中心点的地理坐标以及美国 1970 年人口普查的人口计数进行了列表处理，然后通过计算机构建了五个全国性的人口密度地理网格，其扇区维度为 0.01、0.02、0.04、0.1 和 0.25 度的纬度和经度。如果一个地区的坐标落在扇区的边界内，则整个地区的人口将被分配到一个网格扇区。然后，根据人口密度对扇区进行排序，并列出扇区人口、人口密度、地理位置、累计人口、扇区面积和累计面积。这五组数据被综合成单个方程，一种情况是将人口作为密度的函数，另一种情况是将人口作为面积的函数。例如，从这些数据中可以发现，大约有 80 万人居住在 19 个 0.01 度维度的扇区，人口密度为每平方英里 10 万人或更高（几乎全部在曼哈顿）；大约有 1000 万人居住在 183 个 0.02 度维度的扇区，人口密度为每平方英里 23000 人或更高；大约一半的美国人口，即约 1 亿人，居住在美国总面积的约 0.6%以内，即 20000 平方英里以内。还展示了东北走廊的四个代表性人口密度图，包括等角视图和等高线地图。
