topic Re: AGOL Webmap as JSON? in Web AppBuilder Custom Widgets Questions

AGOL Webmap as JSON?

Anonymous User — Sun, 12 Dec 2021 09:32:50 GMT

Just curious if there is an "out of the box" way to get the web map as JSON from the current AGOL webmap from within a custom widget? Unfortunately, due to client specifications I cannot conform to the Export Web Map Task parameters for the GP Service I'll be using.

I know with the JavaScript API, I can use the PrintTask to do the work for me to get the map in the current state by doing this:

var printTask = new PrintTask()
var Web_Map_as_JSON = printTask._getPrintDefinition(this.map))‍‍

However, when I try that from a custom widget passing in the AGOL web map, I get the following error:

Another thing I found that will give me the web map is to use the ArcGIS Utils:

utils.getItem(this.map.itemId)‍‍

That does give me the web map as JSON, but obviously it is not the current state (i.e. doesn't show which layers are on/off in the current map). Is there an "easy" way or do I have to manually build it?

Re: AGOL Webmap as JSON?

RobertScheitlin__GISP — Sun, 12 Dec 2021 09:32:53 GMT

Caleb,

The problem with using private functions is that they are undocumented. The method takes a map as the first param and a PrintParameters as the second and because you were not providing the PrintParameters.

              var printTask = new PrintTask("your url");
              var template = new PrintTemplate();
              template.preserveScale = false;

              var params = new PrintParameters();
              params.map = this.map;
              params.template = template;
              var Web_Map_as_JSON = JSON.stringify(printTask._getPrintDefinition(this.map, params));
              console.info(Web_Map_as_JSON);‍‍‍‍‍‍‍‍‍

Re: AGOL Webmap as JSON?

Anonymous User — Sat, 17 Dec 2016 14:32:15 GMT

Thanks, Robert! That did the trick.