Create 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.
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// [WriteFile Name=FeatureCollectionLayerFromPortal, Category=Layers]// [Legal]// Copyright 2020 Esri.// Licensed under the Apache License, Version 2.0 (the "License");// you may not use this file except in compliance with the License.// You may obtain a copy of the License at// http://www.apache.org/licenses/LICENSE-2.0// Unless required by applicable law or agreed to in writing, software// distributed under the License is distributed on an "AS IS" BASIS,// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.// See the License for the specific language governing permissions and// limitations under the License.// [Legal]import QtQuick
import QtQuick.Controls
import Esri.ArcGISRuntime
Rectangle {
id: rootRectangleclip: truewidth: 800height: 600MapView {
id: mapViewanchors.fill: parentComponent.onCompleted: {
// Set the focus on MapView to initially enable keyboard navigation forceActiveFocus();
}
PortalItem {
id: portalItemitemId: "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 layersif (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: mapBasemap {
initStyle: Enums.BasemapStyleArcGISOceans
}
}
}
}