Model builder iterate row selection5/10/2023 This value is used as an in-line variable in the output name of the Output Standard Deviational Ellipse variable. The Value variable, which contains the value of the grouping field (Morning, Afternoon, Evening, or Night).These rows are input to the Directional Distribution (Standard Deviational Ellipse) tool. The Row Selection variable containing the selected rows for a unique crime period.This field is used as the grouping field to make the selection, and the selected rows are used to create an output standard deviational ellipse. It contains the field Crime_Peri (crime period), which is the time of day the incident occurred (the strings Morning, Afternoon, Evening, and Night). The Input Feature Class variable is a feature class containing vandalism incident points. To understand the use of Iterate Row Selection in ModelBuilder, see the illustration below, where the model creates a deviational ellipse for theft incidents during different periods of the day-morning, afternoon, evening, and night-to detect an underlying pattern of crime. The Value variable, which contains the name of the feature (based on the grouping field) used as an in-line variable in the output name of the Output Table variable.Selected feature (connected as input to the Zonal Statistics As Table tool).The Iterate Feature Selection tool has two outputs: In this example, the name of the hurricane has been used as a grouping field to make the selection, and the selected feature is used as the input for the Zonal Statistics As Table tool to generate an output table with statistics on the land cover destroyed during the hurricanes' landfall. The Input Raster variable is a land-cover raster. The Input Feature variable is a feature class of five Atlantic hurricane paths with a 100-meter buffer around it. To understand the use of Iterate Feature Selection in ModelBuilder, see the illustration below, where the model calculates how much of the East Coast land-cover map area was destroyed by a 100-meter swath of five category 1 hurricanes. ![]() The output of For is used as the Buffer Distance parameter in the Buffer tool and in the output name as in-line variable substitution. To understand the use of the For tool, see the illustration below, where the For iterator iterates from a value of 500 to a value of 2000, increasing by increments of 500.
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