In snapshot mode, the feature layer retrieves all the features from the associated layer resource and displays them as graphics on the client. If you do not have the map service added as a dynamic map service then the changes will not be visible because once the edits are complete the feature is no longer selected. When editing feature layers in selection mode, you will need to add the map service associated with the feature service to the map as a dynamic map service. Once onSelectionComplete fires, retrieve the selected features using the getSelectedFeatures method.Listen for the onSelectionComplete event.Features are available on the client only while they are selected. In selection mode, features are retrieved from the server only when they are selected. Layer properties such as time offset and definition expression.Map properties such as the current spatial extent and time extent.This is based on the requirements defined in the following properties: In on-demand mode, the feature layer retrieves features from the server when needed. This mode requires an additional request to complete before retrieving any features. Instead of getting a small number of features with several requests (on-demand mode), get all features with a single request. The purpose behind this mode is to reduce server-side load. If the total number of features in a layer are less than maxRecordCount and total vertexes is less than 250,000, snapshot mode is used. This is only applicable to hosted feature services. New (featureCollectionObject, options?)Ĭreates a new instance of a feature layer using a FeatureCollection object.ĭelegate to either on-demand or snapshot mode depending on the characteristics of the service. New (url, options?)Ĭreates a new instance of a feature layer object from the ArcGIS Server REST resource identified by the input URL. SamplesĬSVLayer, DataAdapterFeatureLayer, StreamLayer Constructors Name Also note that modifying attributes, symbol, geometry and visibility of individual features in a WebGL-rendered layer will NOT have any effect. FeatureLayer subclasses do not support WebGL rendering. Note that only the click event will fire when WebGL is enabled. Line symbols must not have arrow markers.This does not affect variables driven by map scale. Attribute-driven size visual variables must have 6 stops or less.Color and opacity visual variables must have 8 stops or less.The layer's renderer must be of type SimpleRenderer, ClassBreaksRenderer, or UniqueValueRenderer.The layer must not use Arcade expressions containing geometry operations.The layer must use on-demand fetch mode.Polygon layers must support returning centroids.FeatureLayers created from FeatureCollections are not supported. Support is limited to layers created from feature services hosted on ArcGIS Online and non-hosted enterprise feature services versions 10.6.1 or later.If any of these conditions are not met, then the layer will automatically switch from WebGL to SVG during the session. The following are current limitations of WebGL-rendered FeatureLayers subject to change in future releases. hasWebGLSurface() - A method for checking whether a layer is rendered with WebGL.setWebglEnabled() - A method for toggling WebGL on/off for the layer.webglEnabled - A constructor option and property.Once enabled globally for the app, WebGL can be toggled on/off using the API below: To enable WebGL rendering of FeatureLayer, paste the following script in your application prior to loading the ArcGIS API for JavaScript:
Arcgis 10.3 layer vs. feature class update#
This allows you to display more data in the map and update the visualization of features more rapidly.
![arcgis 10.3 layer vs. feature class arcgis 10.3 layer vs. feature class](https://blogs.library.duke.edu/data/files/2015/08/Export_Shp.jpg)
Starting at version 3.24, you can opt in to render FeatureLayer with WebGL.
![arcgis 10.3 layer vs. feature class arcgis 10.3 layer vs. feature class](https://i.stack.imgur.com/BshzX.png)
For an example, see the simple renderer in the Drawing Info at
![arcgis 10.3 layer vs. feature class arcgis 10.3 layer vs. feature class](http://www.terra.ufpr.br/portal/infrageo/wp-content/uploads/sites/2/2017/10/gis3.png)
The FeatureLayer will, by default, use the drawing information from the server (requires ArcGIS Server 10 or above). The features in a feature layer can be edited if the isEditable method is true. The layer can be either a (spatial) layer or (non-spatial) table. (Added at v2.0)The feature layer inherits from the graphics layer and can be used to display features from a single layer in either a Map Service or Feature Service. spatialReference # Execute CreateFeatureclass arcpy. Describe ( "C:/workspace/studyarea.shp" ). workspace = "C:/data" # Set local variables out_path = "C:/output" out_name = "habitatareas.shp" geometry_type = "POLYGON" template = "study_quads.shp" has_m = "DISABLED" has_z = "DISABLED" # Use Describe to get a SpatialReference object spatial_reference = arcpy. # Name: CreateFeatureclass_Example2.py # Description: Create a feature class to store the gnatcatcher habitat zones # Import system modules import arcpy from arcpy import env # Set workspace env.