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How is the featurelayer defined in ArcGIS API?
This sample uses a feature service to create the FeatureLayer, as shown below. By default, the FeatureLayer renders the features using a Renderer defined by the feature service. You can customize this by setting the renderer property of FeatureLayer.
How to add a graphic to a featurelayer?
In this sample, we create features by defining the data as an array of objects, then we create a Graphic for each object, specifying the latitude and longitude for each feature we would like to add to the map. After creating the array of graphics that you want to add to the FeatureLayer, you must call applyEdits () on the layer.
How to get feature geometries in JavaScript featurelayer?
To obtain feature geometries at full resolution, use the queryFeatures () method on the FeatureLayer. The query methods in the FeatureLayer class query features directly from the service. For example, the following snippet returns all features from the service, not just the features drawn in the FeatureLayerView.
How does the feature layer work in JavaScript?
In snapshot mode, the feature layer retrieves all the features from the associated layer resource and displays them as graphics on the client. Definition expressions and time definitions are honored. The features are retrieved once the feature layer is added to the map.
How is a circle generated in ArcGIS JavaScript?
The circle is generated client side and is then used to query points that represent census blocks in the buffered area. Click on a point to see more information about the census block.
How is a featurelayer created in JavaScript?
A FeatureLayer can either be created from an array of graphics, a PortalItem, a Map Service, or a Feature Service. This sample uses a feature service to create the FeatureLayer, as shown below. By default, the FeatureLayer renders the features using a Renderer defined by the feature service.
How are gas fields displayed in feature layer?
The gas fields are displayed using a feature layer with ONDEMAND mode. On-demand mode retrieves selected features and features within the current extent. Click the select fields button then draw a rectangle on the map.The toolbar’s onDrawEnd event fires when you finish sketching the selection rectangle.
How to complete a drawing in ArcGIS JavaScript?
Complete the current active drawing. Creates an instance of the requested draw action. Resets the drawing by clearing the active action. Complete the current active drawing. Creates an instance of the requested draw action. Name of the draw action to create.
When to use the drawing mode in ArcGIS?
The drawing mode applies only when creating polygon, polyline, segment draw actions. Vertices are added while the pointer is clicked or dragged. Applies to and is the default for polygon and polyline draw actions. Vertices are added while the pointer is dragged.
When to use the ArcGIS API for JavaScript?
Since: ArcGIS API for JavaScript 4.5. The Draw class provides advanced drawing capabilities for developers who need complete control over creating temporary graphics with different geometries. For example, if you want to prevent users from drawing graphics with self-intersecting lines or overlapping polygons, then you can use this class to
How are features visualized in a featurelayer?
Features in a FeatureLayer are visualized by setting a Renderer to the renderer property of the layer.
Do you need objectId field for feature collection?
Both spatial and non-spatial feature collections require an objectId field, this must be indicated along with an array of field objects, providing the schema of each field. Once those properties are specified, the array of features must be set to the source property.