Both the standard summary field statistics and the weighted summary field statistics will be applied to data for the features in the Summarized Layer parameter value that intersect the Summary Polygons layer. The area of summarized polygons within each polygonįor lines and areas, all weighted statistics will be calculated. The length of summarized lines within each polygon The count of summarized points within each polygon Options are based on the geometry of the summarized layer. You can calculate the lengths and areas of the summarized layers within each polygon using the options in the table below. Statistics are calculated the same way for count-type and rate-type attributes when the summary features are points. Rates are never proportioned.įor count-type attributes, values are proportioned according to the amount of the line within a polygon or the amount of the polygon within another polygon prior to calculating statistics. Examples of rate-type attributes include the population density of a country, the speed limit of a road, or the walkability score of a neighborhood. Rates-Attributes that represent a ratio or index at a point location, along a line, or within a polygon.For line and polygon features, counts are proportioned before calculating standard or weighted statistics. Examples of count-type attributes include the population of a country, the number of taxi pickups in a census block, and the number of dams along a river. Counts-Attributes that represent a sum or quantity of an entity at a point location, along a line, or within a polygon. Standard statistics and geographically weighted statistics can be calculated for attributes that represent either counts or rates. Weighted statistics do not apply to points within polygons. Weighted statistics calculate values using the geographically weighted attributes of lines within a polygon, or the attributes of polygons within a polygon. Standard statistics summarize the statistical values without weighting. Use Summarize Within to calculate standard statistics as well as geographically weighted statistics. You can also calculate simple statistics about the attributes of the input summary features, such as sum, mean, minimum, maximum, and so on. You can view down through the stack and count the number of input summary features that fall within the input polygons. Layers, the input polygons and the input summary features, and stacks them on top of each other. In basic terms, the Summarize Within tool takes two
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