SubtypeFeatureLayer QML Type

A layer that can visualize feature data with different visibility, rendering, popup properties, and so on for some or all of the FeatureSubtype in an ArcGISFeatureTable. More...

• List of all members, including inherited members

Properties

• subtypeSublayers : SubtypeSublayerListModel

Methods

• SubtypeSublayer sublayerWithSubtypeCode(var code)
• SubtypeSublayer sublayerWithSubtypeName(string name)

Detailed Description

The ArcGISFeatureTable must have a ArcGISFeatureLayerInfo::subtypeField defined, and at least one FeatureSubtype defined; otherwise the layer will fail to load.

Subtypes provide a way to organize your data within an ArcGIS feature table. For example, the streets in a city-streets feature table could be categorized into three subtypes: local streets, collector streets, and arterial streets. The benefit of the subtype feature layer is that it lets you configure different layer properties per subtype. This is particularly useful for data, such as utility networks, in which many different network elements are grouped into a single subtype feature layer.

Functional characteristics

The subtype feature layer acts like a group layer that automatically creates one feature layer, or subtype sublayer, for each subtype in the table. Each subtype sublayer can be configured independently of one another. They can have different renderers, label definitions, max and min scales, visibility, layer order in the map, and so on. When a subtype group layer is read from a web map or mobile map, it is represented as a SubtypeFeatureLayer. Saving a map that contains a SubtypeFeatureLayer will save the layer as a subtype group layer. Subtype feature layers are supported in offline maps and will work in offline editing workflows.

Performance characteristics

Queries are optimized across all sublayers. For example, a pan of the map sends a single request to the feature table to cover all the sublayers. If you had manually created a feature layer for each subtype, this would have resulted in one query per feature layer.

See sample: Display subtype feature layer

SubtypeFeatureLayer {
    id: subtypeFeatureLayer
    ServiceFeatureTable {
        url: "https://utilitynetwork.testportal.com/arcgis/rest/services/UtilityNetwork/ElectricGrid23/FeatureServer"
    }
}

Starting with 100.12, you may initialize a SubtypeFeatureLayer with FeatureLayer::serviceLayerId and Layer::item.

See also FeatureLayer.

Property Documentation

Method Documentation