topic Re: Did the heat map renderer not make it into the most recent update? in .NET Maps SDK Questions

Did the heat map renderer not make it into the most recent update?

ClayGinn — Mon, 22 Jan 2018 20:17:30 GMT

I was looking through the release notes and the API reference for 100.2 and I don't see anything about the heat map. Did it not make it into the current update? If not, when can we expect it to arrive?

Thanks,

Clay

Re: Did the heat map renderer not make it into the most recent update?

dotMorten_esri — Mon, 22 Jan 2018 21:21:38 GMT

APIs for creating and assigning heat map renderers did not make it into the API. However if you load a webmap with a heatmap renderer already defined, the map will render it just fine. So there's basically internal rendering support at this point, but the public API to create/modify/assign isn't there yet.

Re: Did the heat map renderer not make it into the most recent update?

MichaelBranscomb — Sat, 11 Dec 2021 13:11:46 GMT

Hi Clay,

It is also possible to create a heatmap using Renderer.FromJson():

Example:

string heatmapJson = "{\"blurRadius\":10,\"colorStops\":[{\"color\":[133,193,200,0],\"ratio\":0},{\"color\":[133,193,200,0],\"ratio\":0.01},{\"color\":[133,193,200,255],\"ratio\":0.01},{\"color\":[133,193,200,255],\"ratio\":0.01},{\"color\":[144,161,190,255],\"ratio\":0.0925},{\"color\":[156,129,132,255],\"ratio\":0.17500000000000002},{\"color\":[167,97,170,255],\"ratio\":0.2575},{\"color\":[175,73,128,255],\"ratio\":0.34},{\"color\":[184,48,85,255],\"ratio\":0.42250000000000004},{\"color\":[192,24,42,255],\"ratio\":0.505},{\"color\":[200,0,0,255],\"ratio\":0.5875},{\"color\":[211,51,0,255],\"ratio\":0.67},{\"color\":[222,102,0,255],\"ratio\":0.7525000000000001},{\"color\":[233,153,0,255],\"ratio\":0.8350000000000001},{\"color\":[244,204,0,255],\"ratio\":0.9175000000000001},{\"color\":[255,255,0,255],\"ratio\":1}],\"maxPixelIntensity\":1249.2897582229123,\"minPixelIntensity\":0,\"type\":\"heatmap\"}";
FeatureLayer featureLayer = new FeatureLayer(new Uri("http://sampleserver6.arcgisonline.com/arcgis/rest/services/Wildfire/FeatureServer/0"));
featureLayer.Renderer = Renderer.FromJson(heatmapJson);
Map.OperationalLayers.Add(featureLayer);‍‍‍‍

For the spec see https://developers.arcgis.com/web-map-specification/objects/heatmapRenderer/

Cheers

Mike

Re: Did the heat map renderer not make it into the most recent update?

omairjamil_lmkr — Thu, 20 Mar 2025 16:53:33 GMT

Still unable to display heat map renderer layer. https://services.arcgis.com/JL4BwWcjcPuWhBm9/arcgis/rest/services/Heatmap_proportional_symbol_map_of_D_C__crime_in_2024_WFL1/FeatureServer