Apply dictionary renderer to feature layer

Convert features into graphics to show them with mil2525d symbols.

Use case

A dictionary renderer uses a style file and a rule engine to display advanced symbology. This is useful for displaying features using precise military symbology.

How to use the sample

Pan and zoom around the map. Observe the displayed military symbology on the map.

How it works

1. Create and load a Geodatabase using a local “.geodatabase” file.
2. Create and load a DictionarySymbolStyle using a style file.
3. Create a FeatureLayer for each of the geodatabase’s featureTables.
4. Create a DictionaryRenderer using the dictionary symbol style and assign it to the feature layer’s renderer.
5. Add the feature layers to the map using addOperationalLayers(_:).
6. Load the feature layers and create a new Envelope from a union of the extents of all layers.
7. Use the envelope to create a viewpoint and pass it to the map view.

Relevant API

• DictionaryRenderer
• DictionarySymbolStyle

Offline data

This sample uses the Joint Military Symbology MIL-STD-2525D style file and the Military Overlay geodatabase. Both are downloaded from ArcGIS Online automatically.

Tags

military, symbol