topic Re: Create a Dynamic Data Source For a GeoJSONLayer's URL in ArcGIS JavaScript Maps SDK Questions

Create a Dynamic Data Source For a GeoJSONLayer's URL

platmoskito — Thu, 23 Mar 2023 00:49:06 GMT

Hello, I initialize my GeoJSONLayer with GeoJSON data in a BLOB url. User actions are supported such as moving the GeoJSON graphic around the map and update the symbology of the graphic through the layer's Unique Value Renderer.

However, a symbology update requires `refresh()` to be called on the layer, which resets the location of the graphic to what it was originally defined in the BLOB. How can I retain the updated position when changing the style of the graphic?

Re: Create a Dynamic Data Source For a GeoJSONLayer's URL

AnneFitz — Thu, 23 Mar 2023 15:28:21 GMT

To update the symbology, you should be able to set a new renderer on the layer instead of having to call `refresh()`, as shown in the following code snippet.

// clone renderer let renderer = layer.renderer.clone(); // make updates renderer.symbol = { type: "simple-fill", color: "red" }; // apply renderer back to layer layer.renderer = renderer;

Here's an example: https://codepen.io/annefitz/pen/BaOGMOv?editors=1000