The Standard Deviational Ellipse; An Updated Tool for Spatial Description
The Standard Deviational Ellipse; An Updated Tool for Spatial Description
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DOI：
10.1080/04353684.1971.11879353
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发表时间：
1971-04
影响因子：
1.4
通讯作者：
R. S. Yuill
中科院分区：
文献类型：
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作者：
R. S. Yuill
地理学领域的一个持续挑战是面状点数据的有效描述。近几十年来，由于定量测量的使用和发展，这种类型的数据得到了相当广泛的使用。对这些数据集的描述也随之对地理学产生了更大的影响。面状点数据的地理描述通常采用三种度量中的一种或几种组合的形式：平均位置、离散度和空间方向或排列。第一个度量是通过单个点或位置对数据集的描述，例如均值、众数或中位数。该点在功能上与面积集的每个点的位置和值相关并由其确定。1 t定义或预定为点集所占区域中所有位置中最具代表性的单个位置。总结一下！关于这一类措施的使用和限制，见Neft的专著第四章。一个点集的区域离散度可以用多种方法测量。一个常见的方法是点之间的平均距离，如th。各种最近邻统计。[2]也有基于面积单位或样方内的点计数的频率分布的测量。a这些统计数据通常
A persistent challenge to the field of geography is the effective description of areal point data. In recent decades, this type of data has had considerably more widespread usage due to the increased use and development of quantitative measurements. The description of these data sets has concomitantly become of greater consequence to the geograph~ r. Geographic description of areal point data has usually been in the form of one or some combination of three measures: average location, dispersion, and orientation or arrangement in space. The first measure is a description of the data set by a single point or location, such as the mean, mode, or median. The point is functionally related to and determined by the location and value of each point of the areal set. 1t defines or is presurned to be the most representative single position of all Iocations in the area occupied by the point set. A summary of th.! uses and restrictions of the measures in this category can be found in Chapter IV of Neft's monograph.'Areal dispersion of a point set may be measured in a number of ways. A common method is some average distance among the points such as th.! various nearest neighbor statistics. 2 There are also measures of frequency distributions based upon point counts within areal units or quadrats. a These stalistics are often