topic Re: Add Feature Layer created from JSON to Legend in ArcGIS JavaScript Maps SDK Questions

Add Feature Layer created from JSON to Legend

ArjunDongre — Thu, 17 Nov 2016 19:17:12 GMT

I have created a geoprocessing task that performs a join, and converts to a JSON which then can be retrieved by the client. The reason for this is to limit the amount of memory being used on the server. I do not want to create lots of feature classes on the server, I want the layers to be stored client side. I also strip some fields from features in my JSON before turning it into a feature collection for use in a Feature Layer. I use a Class Breaks Renderer to visualize my data on the map. I am now trying to display the feature layer in a legend, but am having trouble doing so. Is it possible to display my info in the legend? Thanks.

Re: Add Feature Layer created from JSON to Legend

RobertScheitlin__GISP — Thu, 17 Nov 2016 19:29:02 GMT

Arjun,

Sure The biggest part of making that happen is to be sure to define the drawingInfo of the layer in the layerDefinition when you create the FeatureLayer.

Re: Add Feature Layer created from JSON to Legend

ArjunDongre — Mon, 21 Nov 2016 15:17:57 GMT

This information is not provided in the JSON. Shouldn’t that already be created when the classrenderer is created?

Re: Add Feature Layer created from JSON to Legend

RobertScheitlin__GISP — Mon, 21 Nov 2016 15:31:19 GMT

Arjun,

No if you are creating the FeatureLayer from a FeatureCollection you are responsible for providing all that info in the LayerDefinition.

Re: Add Feature Layer created from JSON to Legend

ArjunDongre — Mon, 21 Nov 2016 15:35:57 GMT

I really feel like it should be a lot easier…thinking about just using a dgrid and populating as I already have my color codes and breaks.