Supporting renderer from ArcGIS.com Feature layer item about esri-leaflet-renderers HOT 3 CLOSED

the short answer is no.

i've always been aware that raw RESTful services have symbology defined (either with or without smart mapping) and that it was possible to override renderers for a layer and save the modification within Webmap JSON, but the third option you describe (new item in AGOL for the layer itself with custom symbology defined for someone else's service) is something i heard about for the first time the other day.

i have to assume that the ArcGIS Online/Portal REST API spec allows you to request JSON defining the item and that its something we could parse in this plugin, but help and samples from you would be incredibly helpful in order to implement the enhancement.

from esri-leaflet-renderers.

i have to assume that the ArcGIS Online/Portal REST API spec allows you to request JSON defining the item

There is actually no way (given a service url) to figure out the item URL. So the scenario that @bviswanathan wants (pass an service URL, figure out item ID, use item renderer) actually can't happen.

However this COULD be wrapped up in another plugin to expose an API like this:

L.esri.FeatureLayer({
  id: 'ARCGIS Online Item ID'
}).addTo(map);

Then we know the item id so we can:

1. Get the item metadata
2. This will have the service URL
3. We can check the /data end point on the item to see if a renderer is stored there
4. Use the appropriate renderer

Since this behavior goes beyond the scope of both Esri Leaflet (rendering the services) and Esri Leaflet Renderers (converting ArcGIS renderers into style functions) it should probably be a separate function.

from esri-leaflet-renderers.

Closing. Please refer to the linked (and closed) issues Esri/esri-leaflet#570 and ynunokawa/L.esri.WebMap#32.

from esri-leaflet-renderers.