maybe I'm dumb, but I can't get the map widget working. I don't know how it's supposed to work: the map keeps loading without showing nothing.
It requests a "dataset ID", I suppose this is the ID of the feature layer I would like to show in the map? For exaple, how about showing all the layers of this dataset? http://rsm.maps.arcgis.com/home/item.html?id=3a1feb3e58794bd88d4ae7c456ecbb76
There is an issue with using the dataset map widget, that we are looking to resolve with a different layout option. In the meantime, if you wanted to use the widget you can grab the dataset ID from your open data site and paste it into the dialog. This will allow you to embed the map of a dataset on your home page.
The dataset ID is part of the URL when viewing a dataset:
Hope this helps,