Summarize Nearby (Standard Feature Analysis)

Summary

Finds features that are within a specified distance of features in the input layer.

Distance can be measured as a straight-line distance or by a specified travel mode. Statistics are then calculated for the nearby features, as in the following:

• Calculate the total population within 5 minutes of driving time of a proposed new store location.
• Calculate the number of freeway access ramps within a 1-mile driving distance of a proposed new store location to use as a measure of store accessibility.

Illustration

Usage

• The Summarize Nearby tool requires two input layers: a layer from which distances will be measured and a layer to summarize. Both layers may be points, lines, or areas. The first input layer can contain up to 1,000 features.

• The nearby distance can be based on a line distance or several different travel modes using time or distance as the measure. Travel modes are only enabled when the first input layer contains point features. You can create multiple output areas by inputting multiple distances or times.

• Some travel modes have an option for using traffic conditions. When traffic conditions are used, they may be based on live conditions or typical conditions for a specified day of the week and time. Live traffic conditions can be offset up to 12 hours from the current time. Times for typical conditions can be set by 15-minute intervals for the entire day and night.

• Travel modes can be configured by the administrator of your organization. The administrator can also add new travel modes or remove travel modes that are not necessary for your organization. The default distance measure will be in miles or kilometers, depending on the units setting in your profile.

Parameters

Dialog

Label	Explanation	Data Type
Input Nearby Layer	Point, line, or polygon features from which distances will be measured to features in the input summary layer.	Feature Set
Input Summary Features	Point, line, or polygon features. Features in this layer that are within the specified distance to features in the input nearby layer will be summarized.	Feature Set
Output Name	The name of the output layer to create on your portal.	String
Distance Measurement	Defines what kind of distance measurement you want to use: straight-line distance or by measuring travel time or travel distance along a street network using various modes of transportation known as travel modes. Straight-line—Use straight-line Euclidean measurement of distance. This is the default. Driving distance—Use distance as driven in an automobile. Driving time—Use distance covered during a specified driving time in an automobile. Trucking distance—Use distance as driven in a truck. Trucking time—Use distance covered during a specified driving time in a truck. Walking distance—Use distance as walked along a street. Walking time—Use distance covered during a specified walking time.	String
Distances (Optional)	A list of double values that defines the search distance (for straight-line and distance-based travel modes) or time (for time-based travel modes). You can enter a single distance value or multiple values. Features that are within (or equal to) the distances you enter will be summarized. The units of the distance values is supplied by the units parameter.	Double
Distance Units (Optional)	If the near type is straight-line or a distance-based travel mode, this is the linear unit to be used with the distance values specified in distances. Valid options include meters, kilometers, feet, yards, and miles. If the near type is a time-based travel mode, values include seconds, minutes, and hours. Miles—Miles Feet—Feet Kilometers—Kilometers Meters—Meters Yards—Yards Seconds—Seconds Minutes—Minutes Hours—Hours	String
Time Of Day (Optional)	Specify whether travel times should consider traffic conditions. To use traffic in the analysis, you must set the near type to a travel-time-based mode. The time of day value represents the time at which travel begins, or departs, from the input points. Two kinds of traffic are supported: typical and live. Typical traffic references travel speeds that are made up of historical averages for each 5-minute interval spanning a week. Live traffic retrieves speeds from a traffic feed that processes phone probe records, sensors, and other data sources to record actual travel speeds and predict speeds for the near future. To ensure the task uses typical traffic in locations where it is available, choose a time and day of the week and convert the day of the week to one of the following dates from 1990: Monday—1/1/1990 Tuesday—1/2/1990 Wednesday—1/3/1990 Thursday—1/4/1990 Friday—1/5/1990 Saturday—1/6/1990 Sunday—1/7/1990 Although the dates representing days of the week are from 1990, typical traffic is calculated from recent traffic trends—usually over the last several months. To use live traffic when and where it is available, choose a date and time within 12 hours of the current time. Esrisaves live traffic data for 12 hours and references predictive data extending 12 hours into the future. If the time and date you specify for this parameter is outside the 24-hour time window, or the travel time in the analysis continues past the predictive data window, the task falls back to typical traffic speeds.	Date
Time Zone (Optional)	Specify the time zone or zones of the chosen time of day. There are two options: GeoLocal (default) and UTC. Geolocal—The time of day value refers to the time zone or zones in which the input points are located. This option causes the analysis to have rolling start times across time zones. This is the default. Coordinated Universal Time (UTC)—The time of day value refers to Coordinated Universal Time (UTC). The start times for all points are simultaneous, regardless of time zones.	String
Return boundaries (Optional)	Specifies whether the input geometries will be returned or the straight-line or travel mode buffer geometry. Checked—The output layer will contain areas defined by the specified near type. For example, if using a straight-line distance of 5 miles, the output will contain areas with a 5-mile radius around the input nearby layer features. This is the default. Unchecked—The output layer will contain the same features as the input nearby layer.	Boolean
Add shape summary attributes (Optional)	Calculate statistics based on the shape of the input summary features, such as the length of lines or areas of polygons of the summary features within each polygon in the input summary layer. Checked—Calculate the shape summary attributes. This is the default. Unchecked—Do not calculate the shape summary attributes.	Boolean
Shape Unit (Optional)	If summarizing the shape of the nearby features, specify the units of the shape summary. When the input summary features are polygons, the valid options are acres, hectares, square meters, square kilometers, square feet, square yards, and square miles. When the input summary features are lines, the valid options are meters, kilometers, feet, yards, and miles. Miles—Miles Feet—Feet Kilometers—Kilometers Meters—Meters Yards—Yards Acres—Acres Hectares—Hectares Square meters—Square meters Square kilometers—Square kilometers Square feet—Square feet Square yards—Square yards Square miles—Square miles	String
Summary Fields (Optional)	A list of field names and statistical summary type that you wish to calculate for all points within each polygon. The count of points within each polygon is always returned. The following statistic types are supported: Sum—The total value. Minimum—The smallest value. Max—The largest value. Mean—The average or mean value. Standard deviation—The standard deviation.	Value Table
Group By Field (Optional)	This is a field from the input summary features you can use to calculate statistics separately for each unique attribute value. For example, suppose the input summary features contain point locations of businesses that store hazardous materials, and one of the fields is HazardClass containing codes that describe the type of hazardous material stored. To calculate summaries by each unique value of HazardClass, use it as the group by field.	Field
Add minority and majority attributes (Optional)	This only applies when using a group by field. If checked, the minority (least dominant) or the majority (most dominant) attribute values for each group field within each boundary are calculated. Two new fields are added to the output layer prefixed with Majority_ and Minority_. Unchecked—Do not add minority and majority fields. This is the default. Checked—Add minority and majority fields.	Boolean
Add group percentages (Optional)	This only applies when using a group by field. If checked, the percentage of each unique group value is calculated for each input nearby feature. Unchecked—Do not add percentage fields. This is the default. Checked—Add percentage fields.	Boolean

Derived Output

Label	Explanation	Data Type
Output Feature Service	The output summarized layer.	Feature Set
Output Group Table	If a group by field was provided, the tool will output a table that contains the calculated statistics for each unique group.	Record Set

Python

arcpy.sfa.SummarizeNearby(sumNearbyLayer, summaryLayer, outputName, nearType, {distances}, {units}, {timeOfDay}, {timeZoneForTimeOfDay}, {returnBoundaries}, {sumShape}, {shapeUnits}, {summaryFields}, {groupByField}, {minorityMajority}, {percentShape})

Name	Explanation	Data Type
sumNearbyLayer	Point, line, or polygon features from which distances will be measured to features in the input summary layer.	Feature Set
summaryLayer	Point, line, or polygon features. Features in this layer that are within the specified distance to features in the input nearby layer will be summarized.	Feature Set
outputName	The name of the output layer to create on your portal.	String
nearType	Defines what kind of distance measurement you want to use: straight-line distance or by measuring travel time or travel distance along a street network using various modes of transportation known as travel modes. STRAIGHTLINE—Use straight-line Euclidean measurement of distance. This is the default. DRIVINGDISTANCE—Use distance as driven in an automobile. DRIVINGTIME—Use distance covered during a specified driving time in an automobile. TRUCKINGDISTANCE—Use distance as driven in a truck. TRUCKINGTIME—Use distance covered during a specified driving time in a truck. WALKINGDISTANCE—Use distance as walked along a street. WALKINGTIME—Use distance covered during a specified walking time.	String
distances [distances,...] (Optional)	A list of double values that defines the search distance (for straight-line and distance-based travel modes) or time (for time-based travel modes). You can enter a single distance value or multiple values. Features that are within (or equal to) the distances you enter will be summarized. The units of the distance values is supplied by the units parameter.	Double
units (Optional)	If the near type is straight-line or a distance-based travel mode, this is the linear unit to be used with the distance values specified in distances. Valid options include meters, kilometers, feet, yards, and miles. If the near type is a time-based travel mode, values include seconds, minutes, and hours. MILES—Miles FEET—Feet KILOMETERS—Kilometers METERS—Meters YARDS—Yards SECONDS—Seconds MINUTES—Minutes HOURS—Hours	String
timeOfDay (Optional)	Specify whether travel times should consider traffic conditions. To use traffic in the analysis, you must set the near type to a travel-time-based mode. The time of day value represents the time at which travel begins, or departs, from the input points. Two kinds of traffic are supported: typical and live. Typical traffic references travel speeds that are made up of historical averages for each 5-minute interval spanning a week. Live traffic retrieves speeds from a traffic feed that processes phone probe records, sensors, and other data sources to record actual travel speeds and predict speeds for the near future. To ensure the task uses typical traffic in locations where it is available, choose a time and day of the week and convert the day of the week to one of the following dates from 1990: Monday—1/1/1990 Tuesday—1/2/1990 Wednesday—1/3/1990 Thursday—1/4/1990 Friday—1/5/1990 Saturday—1/6/1990 Sunday—1/7/1990 Although the dates representing days of the week are from 1990, typical traffic is calculated from recent traffic trends—usually over the last several months. To use live traffic when and where it is available, choose a date and time within 12 hours of the current time. Esrisaves live traffic data for 12 hours and references predictive data extending 12 hours into the future. If the time and date you specify for this parameter is outside the 24-hour time window, or the travel time in the analysis continues past the predictive data window, the task falls back to typical traffic speeds.	Date
timeZoneForTimeOfDay (Optional)	Specify the time zone or zones of the chosen time of day. There are two options: GeoLocal (default) and UTC. GEOLOCAL—The time of day value refers to the time zone or zones in which the input points are located. This option causes the analysis to have rolling start times across time zones. This is the default. UTC—The time of day value refers to Coordinated Universal Time (UTC). The start times for all points are simultaneous, regardless of time zones.	String
returnBoundaries (Optional)	Specifies whether the input geometries will be returned or the straight-line or travel mode buffer geometry. RETURN_BOUNDARIES—The output layer will contain areas defined by the specified near type. For example, if using a straight-line distance of 5 miles, the output will contain areas with a 5-mile radius around the input nearby layer features. This is the default. RETURN_INPUT—The output layer will contain the same features as the input nearby layer.	Boolean
sumShape (Optional)	Calculate statistics based on the shape of the input summary features, such as the length of lines or areas of polygons of the summary features within each polygon in the input summary layer. ADD_SHAPE_SUM—Calculate the shape summary attributes. This is the default. NO_SHAPE_SUM—Do not calculate the shape summary attributes.	Boolean
shapeUnits (Optional)	If summarizing the shape of the nearby features, specify the units of the shape summary. When the input summary features are polygons, the valid options are acres, hectares, square meters, square kilometers, square feet, square yards, and square miles. When the input summary features are lines, the valid options are meters, kilometers, feet, yards, and miles. MILES—Miles FEET—Feet KILOMETERS—Kilometers METERS—Meters YARDS—Yards ACRES—Acres HECTARES—Hectares SQUAREMETERS—Square meters SQUAREKILOMETERS—Square kilometers SQUAREFEET—Square feet SQUAREYARDS—Square yards SQUAREMILES—Square miles	String
summaryFields [[Field, Statistic],...] (Optional)	A list of field names and statistical summary type that you wish to calculate for all points within each polygon. The count of points within each polygon is always returned. The following statistic types are supported: SUM—The total value. MIN—The smallest value. MAX—The largest value. MEAN—The average or mean value. STD—The standard deviation.	Value Table
groupByField (Optional)	This is a field from the input summary features you can use to calculate statistics separately for each unique attribute value. For example, suppose the input summary features contain point locations of businesses that store hazardous materials, and one of the fields is HazardClass containing codes that describe the type of hazardous material stored. To calculate summaries by each unique value of HazardClass, use it as the group by field.	Field
minorityMajority (Optional)	This only applies when using a group by field. If you specify ADD_MIN_MAJ, the minority (least dominant) or the majority (most dominant) attribute values for each group field within each boundary are calculated. Two new fields are added to the output layer prefixed with Majority_ and Minority_. NO_MIN_MAJ—Do not add minority and majority fields. This is the default. ADD_MIN_MAJ—Add minority and majority fields.	Boolean
percentShape (Optional)	This only applies when using a group by field. If checked, the percentage of each unique group value is calculated for each input nearby feature. NO_PERCENT—Do not add percentage fields. This is the default. ADD_PERCENT—Add percentage fields.	Boolean

Derived Output

Name	Explanation	Data Type
resultLayer	The output summarized layer.	Feature Set
groupBySummary	If a group by field was provided, the tool will output a table that contains the calculated statistics for each unique group.	Record Set

Environments

Extent

Licensing information

• Basic: Requires your account in ArcGIS Enterprise to have the Perform Analysis privilege
• Standard: Requires your account in ArcGIS Enterprise to have the Perform Analysis privilege
• Advanced: Requires your account in ArcGIS Enterprise to have the Perform Analysis privilege