Fewer people are visiting some popular venues in Baltimore?s Inner Harbor, although ticket sales are up for other attractions, and officials want to know why.

The Maryland Science Center, the National Aquarium, the Baltimore Area Convention and Visitors Center and General Growth Properties, which bought Harborplace from the Rouse Co., hope a previously planned consumer survey beginning next month on why visitors come ? or don?t come ? to the Inner Harbor will provide some answers, Maryland Science Center CEO Van R. Reiner said.