I have a gmap view displaying nodes with location data. To this I have added an attachment which lists the same node types.

I would like to filter the nodes listed in the attachment to reflect those on the gmap i.e., zoom in on the gmap to reduce the number of markers and reduce the number of nodes listed on the attachement.

The result I'm looking for is similar to this - www.scrumalliance.org/courses/map?country=Australia