Create feature collection layer (Portal item)
Sample Viewer View Sample on GitHubCreate a feature collection layer from a portal item.
Use case
Feature collection layers are often used to hold features with mixed geometry or unstructured data. You can display feature collections stored in a Portal, which are often used for showing content from a CSV or map notes.
How to use the sample
The feature collection is loaded from the Portal item when the sample starts.
How it works
- Create a
Portal
. - Create the
PortalItem
, referring to the portal and an item ID. - Verify that the item represents a feature collection.
- Create a
FeatureCollection
from the item. - Create a
FeatureCollectionLayer
, referring to the feature collection. - Add the feature collection layer to the map's
OperationalLayers
collection.
Relevant API
- FeatureCollection
- FeatureCollectionLayer
- Portal
- PortalItem
About the data
The sample uses a sample layer depicting world populations.
Tags
collection, feature collection, feature collection layer, id, item, map notes, portal
Sample Code
import QtQuick 2.6
import QtQuick.Controls 2.2
import Esri.ArcGISRuntime 100.9
Rectangle {
id: rootRectangle
clip: true
width: 800
height: 600
MapView {
id: mapView
anchors.fill: parent
PortalItem {
id: portalItem
itemId: "32798dfad17942858d5eef82ee802f0b"
Component.onCompleted: load();
onLoadStatusChanged: {
if (loadStatus !== Enums.LoadStatusLoaded) {
return;
}
// if the portal item is a feature collection, add the feature collection to the map's operational layers
if (type === Enums.PortalItemTypeFeatureCollection) {
const featureCollection = ArcGISRuntimeEnvironment.createObject("FeatureCollection", {item: portalItem});
const featureCollectionLayer = ArcGISRuntimeEnvironment.createObject("FeatureCollectionLayer", {featureCollection: featureCollection});
map.operationalLayers.append(featureCollectionLayer);
} else {
console.warn("Portal item with ID '" + itemId + "' is not a feature collection.")
}
}
}
Map {
id: map
BasemapOceans {}
}
}
}