SubtypeFeatureLayer

A layer that can visualize feature data with different visibility, rendering, popup properties, and so on for some or all of the subtypes in an ArcGISFeatureTable. The ArcGISFeatureTable must have an ArcGISFeatureLayerInfo.subtypeField 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 allows you to 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.

Since

200.1.0

Constructors

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Creates a new subtype feature layer object. If are there no ArcGISFeatureTable.featureSubtypes objects defined on the ArcGISFeatureTable, the layer will fail to load.

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fun SubtypeFeatureLayer(item: Item, layerId: Long)

Creates a new subtype feature layer object from a feature service portal item.

Properties

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The mutable collection of SubtypeSublayer The objects in this collection are the same objects in LayerContent.subLayerContents. The difference between the two collections is this collection is modifiable so the layer order is configurable.

Inherited properties

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The attribution text for the layer.

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open override val canChangeVisibility: Boolean

A flag indicating whether the layer content's visibility can be changed. A flag indicating whether the layer content visibility can be changed. Will return false if an error occurs.

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A SQL expression which limits the features available for query and display on the feature layer. The definition expression string should follow standard SQL syntax as detailed in the SQL reference for query expressions used in ArcGIS[https://pro.arcgis.com/en/pro-app/latest/help/mapping/navigation/sql-reference-for-elements-used-in-query-expressions.htm] document.

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The description for the layer. The description of the layer.

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Defines how features are filtered from the display. Use this property to reduce the number of features displayed in the map or scene view. The filter aims to improve data visualization and optimize rendering performance. It only affects the display of features so all features are still available for query methods such as FeatureLayer.selectFeatures(QueryParameters, SelectionMode): Future.

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Defines properties for dynamically aggregating and summarizing groups of features as the map scale changes. A null value indicates the layer does not use feature reduction. FeatureReduction is only supported for point feature layers in dynamic rendering mode (FeatureRenderingMode.Dynamic).

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The feature table whose features are drawn on the map by this layer.

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Defines the properties that allow a layer to be floor-aware. When a layer is configured as floor-aware, it has a FloorAware.floorDefinition property that defines properties that allow a layer to be floor-aware. When it is null (default value) the specific layer does not support floor filtering.

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The full extent of this layer, which is the extent where all layer data is contained. You can use this to zoom to all of the data contained in this layer. For feature layers, the extent is retrieved from the tables extent.

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open override val fullTimeExtent: StateFlow<TimeExtent?>

The full time extent of the object. A null if the object is not time aware or if an error occurs.

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var id: String

The unique identifying string for the layer, for example specified in a map or scene. The id is used by other parts of this API to refer to a specific Layer, such as in a set of FeatureFenceParameters or a FacilityLayerDefinition. If not supplied, all layers will be assigned a unique id when created.

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Whether the layer supports identify. If the layer is not loaded it may return false if identify support is determined by metadata that is not yet available.

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open override var isPopupEnabled: Boolean

A flag indicating whether the PopupDefinition defined on the PopupSource is enable / disable. Will return false if an error occurs.

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open override var isTimeFilteringEnabled: Boolean

A flag indicating whether the object must use the time extent defined on the owning GeoView to filter its data.

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open override var isVisible: Boolean

The layer content's visibility. The layer content visibility. Will return false if an error occurs.

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val item: Item?

The item the layer has been created from.

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The collection of LabelDefinition objects that define how labels are displayed.

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True if features in the layer are labelled, otherwise false.

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open override val loadStatus: StateFlow<LoadStatus>

The load status.

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The maximum scale for the layer. This controls the maximum scale level the layer can zoom to. All of the connected map views will be updated.

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The minimum scale for the layer. This controls the minimum scale level the layer can zoom to. All of the connected map views will be updated.

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open override var name: String

The name of this layer.

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The opacity for the layer. All of the connected map views will be updated.

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open override var popupDefinition: PopupDefinition?

The pop-up definition. The PopupDefinition associated with the popup source. A null if an error occurs or if the popup source is not associated with a pop-up definition.

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open override var refreshInterval: Long?

The objects refresh interval. The refresh interval, in milliseconds. A refresh interval of null means never refresh.

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The renderer specifies how the features are symbolized.

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The mode defines how the feature layer is rendered. FeatureRenderingMode.Static mode is better suited for displaying large datasets (in terms of the number of vertices) and for complex symbology because it does not update the layer's display while pan/zoom operations are in progress.

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True if the layer's symbols and labels honor the map's reference scale, otherwise false. If the map has a positive reference scale, and the layer honors it, then symbols and labels are drawn at their specified size when the viewing scale is the same as the reference scale. They will grow or shrink as the view zooms in or out, to keep the symbol a fixed size on the map. If the map has no reference scale, the reference scale is zero, or this feature layer's scaleSymbols property is false, then the symbols and labels will be drawn at their fixed screen size.

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Properties that are applied when the layer is rendered in a 3D scene using a SceneView object.

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open override var showInLegend: Boolean

A flag indicating whether the layer content participates in the legend. A flag indicating whether the layer content is shown in the legend.

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The spatial reference of the layer.

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open override val subLayerContents: StateFlow<List<LayerContent>>

The sub layer contents of a layer content.

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open override val supportsTimeFiltering: Boolean

A flag indicating whether the object supports filtering its contents by time values with the extent set on the owning GeoView.

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The mode defines whether feature tiling is used to retrieve the features from the feature service. The default tiling mode is FeatureTilingMode.EnabledWhenSupported.

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open override val timeInterval: TimeValue?

The suggested time slider step size for this time aware object. Can be null if no time interval is suggested for this time aware object.

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open override var timeOffset: TimeValue?

The time offset applied to this object. The offset is subtracted from the time extent set on the owning GeoView. This allows for data from different periods of time to be compared.

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Unknown data from the source JSON. Unknown JSON is a dictionary of values not defined in the ArcGIS specification used to create this object but found in the source JSON. If the object is written back to JSON, any unknown JSON data is not persisted. The ArcGIS specification may be for a web map, web scene, REST API, and so on.

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Unsupported data from the source JSON. Unsupported JSON is a dictionary of values defined in the ArcGIS specification used to create this object but not currently used in this API. If the object is written back to JSON, any unsupported JSON data is persisted. The ArcGIS specification may be from a web map, web scene, REST API, and so on.

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val visibilityChanged: SharedFlow<Boolean>

Callback invoked when the visibility of the layer changes.

Functions

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open override fun clone(): SubtypeFeatureLayer
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Finds a SubtypeSublayer for a feature subtype based on the FeatureSubtype.code When working with a particular ArcGISFeature, the FeatureSubtype.code is the value of the ArcGISFeatureLayerInfo.subtypeField field. The corresponding SubtypeSublayer can be found using the value of that field.

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Finds a SubtypeSublayer for a feature subtype based on the subtype name.

Inherited functions

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open override fun cancelLoad()

Cancels loading metadata for the Loadable object.

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Clears all selected features.

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open operator override fun equals(other: Any?): Boolean
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open suspend override fun fetchLegendInfos(): Result<List<LegendInfo>>

Fetches the list of legend info.

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Returns a collection of the currently selected features.

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open override fun hashCode(): Int
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open override fun isVisibleAtScale(scale: Double): Boolean

Returns the layer content's effective visibility at the specified scale. Returns the effective layer content visibility. This effective visibility takes care of the effective visibility of the parents at the specified scale. Will return false if an error occurs.

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open suspend override fun load(): Result<Unit>

Loads the metadata for the object.

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Reset the visibility of all features back to their original state.

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Reset the renderer back to the original renderer provided by the FeatureTable.

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open suspend override fun retryLoad(): Result<Unit>

Loads or retries loading metadata for the object.

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fun selectFeature(feature: Feature)

Selects the given feature and adds it to the current collection of selected features. Selected features are rendered according to the GeoView.selectionProperties.

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Selects the given features and adds them to the current collection of selected features. Use the FeatureLayer.getSelectedFeatures(): Future to retrieve all of the selected features.

Selects the features that match the criteria in the QueryParameters object and adds them to the current collection of selected features.

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fun setFeaturesVisible(features: Iterable<Feature>, visible: Boolean)

Sets the visibility of the given features.

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fun setFeatureVisible(feature: Feature, visible: Boolean)

Sets the visibility of the given feature.

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fun unselectFeature(feature: Feature)

Unselects the given feature and removes it from the current collection of selected features.

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Unselects the given features and removes them from the current collection of selected features.