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spatial descriptive statistics
Spatial descriptive statistics are used for a variety of purposes in geography, particularly in quantitative data analyses involving Geographic Information Systems (GIS).
==Types of spatial data==
The simplest forms of spatial data are ''gridded data'', in which a scalar quantity is measured for each point in a regular grid of points, and ''point sets'', in which a set of coordinates (e.g. of points in the plane) is observed. An example of gridded data would be a satellite image of forest density that has been digitized on a grid. An example of a point set would be the latitude/longitude coordinates of all elm trees in a particular plot of land. More complicated forms of data include marked point sets and spatial time series.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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