Expose method that converts the mapView into a WebMap_as_JSON

gqzomer

I am a developer of GIS Web components, and I would greatly appreciate it if the logic that converts a MapView into a WebMap_as_JSON could be exposed in a public method. We run a custom printing service that uses the Export Web Map Task geoprocessor with extra parameters to enable the printing use cases of my Organisation.

Both the PrintViewModel.print() and the print.execute() combine building the payload and sending the request. Exposing the logic that generates the WebMap_as_JSON as a seperate method would benefit our workflow for two reasons.

Lower code complexity: It would make it easier to edit the WebMap_as_JSON payload before sending the request to the server. Currently we have to rely on requestInterceptors to configure the payload correctly
Easier troubleshooting: With over 1000 daily users sometimes the printjobs fail. We track these failures with dynatrace but getting the Webmap_as_JSON which is crucial for troubleshooting is cumbersome. A seperate method would make logging the json payload to dynatrace a breeze.

Justin_Greco · ‎07-11-2026

You can call .toJSON() on the map.

  <body>
    <arcgis-map item-id="05e015c5f0314db9a487a9b46cb37eca">
      <arcgis-zoom slot="top-left"></arcgis-zoom>
      <arcgis-legend slot="bottom-right"></arcgis-legend>
    </arcgis-map>
    <script>
      document.querySelector('arcgis-map').addEventListener('arcgisViewReadyChange', (event) => {
        const webmapJson = event.target.map.toJSON();
        console.log(webmapJson)
      })
    </script>
  </body>

Justin_Greco_0-1783794840639.png

gqzomer

@Justin_Greco This returns a WebMap JSON which is different from the WebMap_as_JSON specification. Most notably it excludes GraphicsLayers and the graphics contained within them. It also excludes any Graphics that are added to the MapView.graphics property.