What is feature layer?
A feature layer is a grouping of similar geographic features, for example, buildings, parcels, cities, roads, and earthquake epicenters. Features can be points, lines, or polygons (areas). Feature layers are most appropriate for visualizing data on top of your basemaps.
How do I add a feature layer to a map?
Add a point feature layer Use the FeatureLayer class to reference the Trailheads URL and add features to the map. Go to the Trailheads URL and browse the properties of the layer. Make note of the Name, Type, Drawing Info, and Fields properties. In CodePen, create a FeatureLayer and set the url property.
How do I add map features in ArcGIS?
- In Map Viewer, open the map containing the layer or add the layer directly.
- Pan and zoom to the location on the map where you need to add the feature.
- Click Edit.
- To enable feature snapping, click Snapping, switch on the Enable snapping toggle button, and enable or disable the following snapping options:
How do you digitize points in ArcGIS?
Digitize by tracing
- Start an edit session.
- Navigate to the Editor toolbar, and click the Create Features button. This opens the Create Features window.
- Select the layer to edit and the Construction Tools.
- Navigate to the Editor toolbar, and click the Trace tool.
- Click the map, and start tracing by moving the pointer.
What are polygons in GIS?
A polygon feature is a GIS object that stores its geographic representation—a series of x and y coordinate pairs that enclose an area—as one of its properties (or fields) in the row in the database.
What is the purpose of digitizing in GIS?
Digitizing in GIS is the process of converting geographic data either from a hardcopy or a scanned image into vector data by tracing the features. During the digitzing process, features from the traced map or image are captured as coordinates in either point, line, or polygon format.
What is a featurelayer in ArcGIS?
A FeatureLayer is a single layer that can be created from a Map Service or Feature Service ; ArcGIS Online or ArcGIS Enterprise portal items; or from an array of client-side features. The layer can be either a spatial (has geographic features) or non-spatial (table).
How do I view the features in a featurelayer?
Features in a FeatureLayer are visualized by setting a Renderer to the renderer property of the layer.
What are the requirements to create a featurelayer from a URL?
The geometry type of features in the layer. All features must be of the same type. This property is read-only when the layer is created from a url. When creating a FeatureLayer from client-side features, this property is inferred by the geometryType of the features provided in the layer’s source property.
What is the layer ID of a featurelayer?
The layer ID, or layer index, of a Feature Service layer. This is particularly useful when loading a single FeatureLayer with the portalItem property from a service containing multiple layers. You can specify this value in one of two scenarios: When loading the layer via the portalItem property.