Labeling

The labeling profile allows the map author to write an expression that determines the label to show on the map for each feature. The script evaluates for each label as it is to be drawn. It is expected that the script returns a text value, comprising the label to be drawn.

Context

The following products implement this profile:

• ArcGIS Maps SDK for JavaScript
• ArcGIS Pro
• ArcGIS Enterprise
• ArcGIS Online
• ArcGIS Maps SDKs for Native Apps

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

Function bundles

Core | Geometry

Return types

Text

Example

Calculates the associated compass direction of the wind based on the wind direction in degrees. Returns the wind speed, with units, and the calculated compass direction.

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var DEG = $feature.WIND_DIRECT;
var SPEED = $feature.WIND_SPEED;
var DIR = When( SPEED == 0, '',
  (DEG < 22.5 && DEG >= 0) || DEG > 337.5, 'N',
   DEG >= 22.5 && DEG < 67.5, 'NE',
   DEG >= 67.5 && DEG < 112.5, 'E',
   DEG >= 112.5 && DEG < 157.5, 'SE',
   DEG >= 157.5 && DEG < 202.5, 'S',
   DEG >= 202.5 && DEG < 247.5, 'SW',
   DEG >= 247.5 && DEG < 292.5, 'W',
   DEG >= 292.5 && DEG < 337.5, 'NW',
   ''
);
var WIND = SPEED + ' mph ' + DIR;
return WIND;