I have Jaspersoft server AWS version, I see in the samples a world map chart report. However when I create a new adhoc view, I can't see any map in the chart types.
How can I create a world map report based on an adhoc view?
There is no such option in Ad Hoc designer. You would have to use a report designer like iReport Professional or Jaspersoft Studio Professional. A world map component is available under the Maps Pro palette.
Hope clarifies a little. Please check iReport Ultimate Guide for detailed information (it's availalbe in the Docs section).