Create hosted feature layer
In ArcGIS Velocity, the most common workflow is to have a real-time analytic generate a layer as a part of the feature layer (new) output. However, you can also create a hosted feature layer directly from the Layers page without creating or running a real-time analytic. This capability is useful when you only need a stand-alone hosted feature layer (spatiotemporal) without analytics. The layers can be managed in the Velocity app on the Layers page. Once created, the feature layer and associated map image layer are available for use in Velocity.
The feature layer maintains a defined schema, allowing any incoming feeds with a matching schema to be used for analytics and written directly to the feature layer output. You can write to this layer using real-time analytics by adding it as an existing feature layer.
Note:
You can also write to this layer directly or programmatically through the REST API.
Create a feature layer
Complete the following steps to create a feature layer through the Layers page in Velocity:
In a browser, open the Velocity app and sign in using your ArcGIS organization credentials.
Click the Layers tab under the Output section to open the Layers page.
Click the + Create layer button to open the Create Layer dialog box.
In the Define Schema step:
Choose the Add field option to add new field types.
The supported field types are string, boolean, date, int32, int64, float32, and float64.
Type the field name.
You can provide any field name of your choice.
After completing the above steps, click Next.
In the Identify Key Fields step:
Choose the Geometry type option under the Location parameter.
Supported geometry types are none, point, polyline, polygon, multipoint, and envelope.
Configure the Date and time settings, and specify the Start time and End time fields as applicable.
Choose the Track ID option if applicable.
After completing the above steps, click Next.
In the Configure Layer Properties step, choose the data retention period and data retention settings, and click Next.
In the Save step:
Type a unique name for the feature layer.
Type a summary describing the use and content of the layer.
Select a folder where the layer will be saved.
Click Complete to create the feature layer.
Once the layers are created, you can close the Create Layer dialog box and view the feature layer and associated map image layer on the Layers page.
View a feature layer
Complete the following steps to view the created feature layer and associated map image layer:
In a browser, open the Velocity app and sign in using your ArcGIS organization credentials.
Click the Layers tab under the Output section to open the Layers page.
On the Layers page, you can view each layer’s title, layer type, associated dataset, and modified date. You can filter layers by title and switch between a table or grid format.
To view a feature layer or map image layer in a web map, click the Open in Map Viewer icon.
A new browser tab opens and displays a web map with the feature layer or map image layer. For information about changing symbology and rendering options for feature layers, refer to visualize feature layers.
To edit a feature layer or map image layer, click the Edit icon.
A new browser tab opens with various configuration options for viewing and editing. For more information, refer to visualize map image layers.
After completing these steps, the feature layer or map image layer opens in a new browser tab within Map Viewer, allowing you to view the data on an interactive web map. You can explore the layer, adjust symbology, and apply rendering options using the tools available in Map Viewer. If you chose to edit, the layer opens in a configuration view where you can update settings, adjust layer properties, and make additional edits as required.
Delete a feature layer
When working with feature layers in Velocity, you can delete a feature layer and its accompanying map image layer. Keep in mind that deleting the feature layer also deletes its data, any data exported to the feature layer archive, and the associated map image layers.
Complete the following steps to delete a feature layer and its accompanying map image:
In a browser, open the Velocity app and sign in using your ArcGIS organization credentials.
Click the Layers tab under the Output section to open the Layers page.
Locate the layer you want to delete, click the three-dot drop-down menu, and choose the Delete option.
Optionally, you can also delete multiple layers at once by selecting the check box next to each layer. When one or more layers are checked, the Delete selected layers option appears. You can click this option to remove all selected layers.
In the confirmation dialog, click the Yes button to permanently delete a feature layer or a map image layer.
Note:
Deleting a feature layer cannot be undone, and all data will be deleted.
A map image layer is a visualization of the data and is tied to the life cycle of the feature layer. A map image layer can be deleted without deleting the underlying data. Even if you delete the associated map image layer, the feature layer remains.
Considerations and limitations
Consider the following when using feature layers in Velocity:
Creating a feature layer through the Layers page is designed only for the hosted feature layer using the ArcGIS data store configured as a spatiotemporal data store.
Deleting a feature layer also deletes the associated map image layer and underlying data.