topic Streaming Location of Vehicle Shared Publicly? in ArcGIS Velocity Questions

Streaming Location of Vehicle Shared Publicly?

ArmstKP — Thu, 27 Oct 2022 14:08:26 GMT

I have noticed that any streaming service created/stored in Velocity is NOT able to be shared publicly?

We would love to share location of plows on our public map, but currently this seem not possible???

Re: Streaming Location of Vehicle Shared Publicly?

PeterNasuti — Thu, 27 Oct 2022 14:42:37 GMT

@ArmstKP Thanks for reaching out with your question! At the current release, ArcGIS Velocity backed feature layers and stream layers can be shared with groups or with your organization, but cannot be shared to the public.

The current option in ArcGIS Velocity to share data to the public is to create an output feature layer hosted in an ArcGIS Online layer using the Feature layer (new) or Feature layer (existing) outputs.

With our 3.3 release in early November 2022, the Feature layer (existing) output will also support writing to ArcGIS Enterprise/ArcGIS Server backed layers which of course can be configured to be public facing.

https://doc.arcgis.com/en/iot/disseminate-and-notify/feature-layer-new-.htm

https://doc.arcgis.com/en/iot/disseminate-and-notify/feature-layer-existing-.htm

Re: Streaming Location of Vehicle Shared Publicly?

ArmstKP — Thu, 27 Oct 2022 14:46:25 GMT

@PeterNasuti Perfect! Thank you for that information; very helpful!

Re: Streaming Location of Vehicle Shared Publicly?

ArmstKP — Thu, 27 Oct 2022 16:00:56 GMT

@PeterNasuti Peter, I have followed your steps in creating an output feature layer hosted in ArcGIS Online, by creating a new Feature layer. When I go to share it publicly, I get this error:

Re: Streaming Location of Vehicle Shared Publicly?

PeterNasuti — Thu, 27 Oct 2022 16:07:52 GMT

@ArmstKP If ArcGIS Online is not providing any additional information or context associated with that error, please reach out to Esri Support Services for assistance investigating why the given layer cannot be shared to the public. Once Velocity creates an ArcGIS Online hosted feature layer, it is a native ArcGIS Online layer that could be treated like any other online layer.

Re: Streaming Location of Vehicle Shared Publicly?

ArmstKP — Thu, 27 Oct 2022 16:13:30 GMT

@PeterNasuti Peter, I noticed that the icon is not the normal ArcGIS Online Hosted Feature layer icon, but has the Velocity Feature layer icon. Is this the issue, that it is still seeing it as coming from Velocity?

Re: Streaming Location of Vehicle Shared Publicly?

PeterNasuti — Thu, 27 Oct 2022 16:40:22 GMT

Based on the icons and the fact that there is an accompanying map image layer, you have created a "Velocity feature layer" with data stored in a spatiotemporal layer. This layer type cannot be shared to the public, thus the error message you witnessed.

ArcGIS Online hosted feature layers however can be shared to the public. The Velocity "Feature layer (new)" output can be configured to create an ArcGIS Online hosted feature layer. See the following screenshot for reference. By unclicking the toggle "store data in a spatiotemporal feature layer", when unchecked the corresponding feature layer created will exist in the ArcGIS Online hosted feature layer. You can also use the "Feature layer (existing)" output to write to an existing ArcGIS Online hosted feature layer.

Re: Streaming Location of Vehicle Shared Publicly?

ArmstKP — Thu, 27 Oct 2022 20:27:22 GMT

@PeterNasuti Thank you. I have tried this as well, but our AVL snowplow feed is usually around 10 e/s and thus our average is above 2 e/s in our feed. So, I am not able to save and start the feed to create the Feature layer (new) output. Does this basically mean that I just won't be able to share last vehicle locations to the public?

Re: Streaming Location of Vehicle Shared Publicly?

PeterNasuti — Mon, 31 Oct 2022 12:07:31 GMT

Thanks for your reply - it is correct that the Feature layer (new or existing) output when writing to an ArcGIS Online hosted feature layer is limited to an average of 2 events/second (120 records per minute, per output). This is a limit imposed from the ArcGIS Online team that ArcGIS Velocity follows. ArcGIS Online organizations with a premium feature data store are able to sustain/allow higher data write speeds. This will be available with the following release of ArcGIS Velocity in early 2023.

For some public facing applications, organizations will utilize the Control Event Volume tool to reduce the number of updates/records sent to an output based on feature Track ID. This could be leveraged in your circumstance to keep your update Velocity around/under 2 e/s to be able to write to an ArcGIS Online hosted feature layer if you need to share this layer with the public. The downside to this workflow would be that vehicle location updates to the public could be slightly delayed (likely under a minute, it depends on your number of vehicles and update frequency).

https://doc.arcgis.com/en/iot/analyze/control-event-volume.htm

We have also implemented a validation enhancement to change the 2 event per second validation error to be a validation warning. There are perfectly valid cases where a feed has a higher rate than 2 e/s but the analytic flow reduces the number of features to under 2 events per second at the output. This will be implemented with our 3.3 release in early November, however the current workaround is to start the feed, and then start the real-time analytic before the feed has started (or start the real-time analytic first).

Re: Streaming Location of Vehicle Shared Publicly?

ArmstKP — Mon, 31 Oct 2022 13:59:29 GMT

Peter, this is great. Thank you for the detailed information and workaround. Can't thank you enough!

Re: Streaming Location of Vehicle Shared Publicly?

MattGeorge1 — Mon, 14 Nov 2022 20:37:25 GMT

I’ve been following along here reading the comments and trying to figure out the best workflow to get my Velocity feed output to a public map. Goal is to show where our snow plows have been and where they currently are.

I have a the feed setup with our winter ops trucks, all the arcade expressions have been parsed the array coming in from the AVL source. Correct me if I’m wrong, but if I want to share a public facing layer I need to turn off “Store data in spatiotemporal feature layer and setup a (new) layer. I’ve read the documentation, but there’s a lot of it and it’s a little confusing. After turning off spatiotemporal, Choose Add all new features, keep existing features and schema. I could call this layer Winter fleet (past locations)

Then setup another layer, again (not a streaming layer output in Velocity), but another Configure feature layer (New) call it current locations and also don’t turn on spatiotemporal feature layer, choose “Keep only latest feature for each Track ID value.

Would this be the only way to get the Velocity feed onto a public facing map? Understood I’ll need to play around with how long I run the analytic that produces the outputs and watch my feeds to not burn up too many credits or grow the cloud storage too big. I suppose if this works it’s really one of the big differences between setting up on ArcGIS Server Geoevent vs Velocity?

Could someone explain when it be best to run a stream layer in Velocity if my above is the only way to get a public map out. My understanding is the stream layer is a Velocity feature which is why it won’t share to public, would choosing a stream layer be used for internal OpsDash features and functions.

Thanks, Matt

Re: Streaming Location of Vehicle Shared Publicly?

PeterNasuti — Mon, 14 Nov 2022 20:54:15 GMT

Happy to clarify a few items:

Velocity-backed layers (map, feature, or stream layers) cannot be shared to the public, however they can be shared to the Organization

ArcGIS Velocity can write to/create new ArcGIS Online hosted feature layers (uncheck store in spatiotemporal as you had mentioned), which can be shared with the public

ArcGIS Velocity can write to existing ArcGIS Online hosted feature layers which can be shared with the public, using the Feature layer (existing) output

ArcGIS Velocity can write to existing ArcGIS Server feature services using the Feature layer (existing) output, and of course your ArcGIS Server feature services can be shared to the public

Additionally, Feature layer (new) or Feature layer (existing) Velocity outputs to ArcGIS Online hosted feature layers only allow outputs of up to 120 records written per minute. This is an ArcGIS Online limitation.

Re: Streaming Location of Vehicle Shared Publicly?

MattGeorge1 — Tue, 15 Nov 2022 15:26:17 GMT

@PeterNasuti Thanks Peter