Since version: 1.15
In the feature reduction popup profile, map authors can write expressions that return values (i.e. attributes) for display in the popup of a clustering or binning visualization. Expressions can be referenced in the popup content's text template, field tables, and media charts. The expression executes when the popup displays. The script should return either text or a number and be referenced in the table cell or text comprising the popup's content.
Context
The following products implement this profile:
Spatial reference
The spatial reference of the map in which the expression executes determines the execution context's spatial reference.
Time zone
The time zone of the map in which the expression executes determines the execution context's default time zone.
Profile variables
| Variable Name | Type | Description | Since version |
|---|---|---|---|
| $feature | Feature | Provides access to the aggregate fields defined in either clustering or binning popups, such as $feature.cluster and any other fields summarized from the points represented by the aggregate (e.g. $feature.cluster). | 1.15 |
| $aggregatedFeatures | FeatureSet | A FeatureSet containing all the features represented by the cluster or bin. | 1.15 |
| $view | Dictionary | The properties available from the view, as defined in the table below. Only supported in 2D MapViews. | 1.30 |
Properties of $view:
| Variable Name | Type | Description |
|---|---|---|
| scale | Number | The scale of the map at the time the expression evaluates. |
| timeProperties.currentStart | Date | The start time of the map's time extent as indicated by a time slider component at the time the expression evaluates. This value dynamically updates (and may trigger the re-execution of the Arcade expression) when a time slider is used to update time-aware popups based on date field. A null value indicates the start time is inclusive since the beginning of time. |
| timeProperties.currentEnd | Date | The end time of the map's time extent as indicated by a time slider component at the time the expression evaluates. This value dynamically updates (and may trigger the re-execution of the Arcade expression) when a time slider is used to update time-aware popups based on date field. A null value indicates the end time is indefinite with no end. |
| timeProperties.startIncluded | Boolean | Indicates if the current date is included in the map's current time extent. |
| timeProperties.endIncluded | Boolean | Indicates if the current date is included in the map's current time extent. |
Function bundles
Core | Geometry | Data Access | Portal Access
Return types
Example
Calculates the number of crashes that had at least one fatality within a cluster of vehicle accidents.
// returns the total number of car crashes
// that resulted in at least one fatality in a
// cluster representing motor vehicle accidents
Count(Filter($aggregatedFeatures, "FATALITIES > 0"))