Best approach for rendering large amounts of polygons on map

[avecchi]

Hello,

I don't know if this is an unreasonable task that I'm attempting to do but I'm trying to render around 550,000 polygons on a SceneView or MapView but every method that I go with seems to render either too slowly or break the view.

Here are the 2 methods I've tried so far:

- Download all data client side and create a GeoJSON layer based on a client side blob URL

- Upload all data to a hosted FeatureLayer service on ArcGIS

[ReneRubalcava]

I assume they are not hosted as a FeatureService? If you upload them as a FeatureService, you can enable caching, and greatly improve performance.

https://www.esri.com/arcgis-blog/products/js-api-arcgis/mapping/performance-improvements-for-jsapi-4...

[avecchi]

They were hosted as a FeatureService but unfortunately I don't think caching will help me as I need to be able to dynamically add new sets of those polygons.

[jcarlson]

Is the layer dynamic, or will the features basically stay as they are? Do they vary in size? If there are very small features, you might try setting up a scale-based filter on them, too. Or is there some other reason that all features need to be rendered at once?

[avecchi]

The layer is dynamic, the plan is to insert packets of around 2000 polygons at a time every 30 seconds.

The polygons are all 30m x 30m squares. 

A scale based filter might work but I would need the scale to be pretty high as the idea is to paint a sort of picture on the ground with these squares and be able to click on a square to display its' value.

[MassoudAhmadi]

I am facing a similar issue where we need to dynamically add a large set of features to an existing feature layer on the map. Were you able to find a solution to the problem you were facing?