Are you loading the Maps API? This is the part that does that. Add it to your hosted HTML file.
<script src='http://maps.google.com/maps?file=api&v=2&key=ABCDEFG' type='text/javascript'></script>
As the page says, you'll need to replace the key ABCDEFG with your maps API key.
Hi,
I've a problem using google visualization. I've tried to make in GWT
the example show here http://code.google.com/intl/it-IT/apis/visualization/documentation/gallery/geomap.html
(section Markers Example).
When I'm trying to draw the markers on the map, the google widget
display this error message "Google Maps API not included.".
Instead, if you display only region there are no problems and them are
show.
Any ideas?
Thanks
Regard