topic Re: JSON.stringify esri.map object in ArcGIS JavaScript Maps SDK Questions

JSON.stringify esri.map object

ChrisJudd1 — Thu, 03 Oct 2013 03:24:36 GMT

Hi, I would like to be able to xhrpost the map object. However, when I try to JSON.stringify the map, I get the following error: TypeError: Converting circular structure to JSON.

How can this be done? I know its possible since the print and gp tasks are able to turn the map into a string before posting it.

Thanks,
Chris

Re: JSON.stringify esri.map object

ReneRubalcava — Thu, 03 Oct 2013 04:35:46 GMT

The print task parses the map object manually to create a JSON object that matches the ExportWebMap specification to use Print GP Services.
http://resources.arcgis.com/en/help/main/10.1/index.html#//0154000004w8000000

So you can do the same, but you'd need to step through the map object, JSON.stringify() won't do it.

Re: JSON.stringify esri.map object

ChrisJudd1 — Fri, 04 Oct 2013 13:23:14 GMT

Thank you sir, that answered my question!

Re: JSON.stringify esri.map object

ReneRubalcava — Fri, 10 Dec 2021 23:00:12 GMT

Just a quick update on this. You can get the mapOptions and operationalLayers (probably most tedious to process) by using the PrintTask.

PrintTask.prototype._getPrintDefinition(map);

After that you'd need to mixin the layoutOptions with your legendOptions if needed and the extra parameters.
Send an object as

{
  Web_Map_as_JSON: <web map as json>,
  Format: <jpg, pdf, whatever>,
  Layout_Template: <template name>
}

You're good to go.

Re: JSON.stringify esri.map object

Arne_Gelfert — Tue, 04 Feb 2020 18:31:11 GMT

Thanks, Renee. - For anyone needing more info, there is a somewhat more recent related thread here:

Get the WebMap from Javascript API esri/map