NY Giants fans began pouring into lower Manhattan’s “Canyon of Heroes” early Tuesday to give a ticker-tape salute to their Super Bowl champs.

Crowds wearing the team’s royal blue jerseys began flooding out of subway stations, hopping off buses and trains and exiting the Staten Island ferry at 7 a.m. to secure the best vantage points for the 11 a.m. victory parade.

The ticker-tape parade will start at 11 a.m., and officials predicted the confetti left behind could top the record 57 tons crews cleaned up after the march honoring the Yankees’ 1999 World Series win.

The parade will start at Battery Place and Washington St. at 11 a.m. and travel up Broadway — the so-called Canyon of Heroes — to City Hall, where the team will be presented with the keys to the city. Then there will be a rally at the Meadowlands with New Jersey Gov. Chris Christie at 3 p.m.

The city plans to set up three large screens outside City Hall so more fans can see the ceremony.

With up to a million fans expected, Mayor Bloomberg said the festivities could pump up to $38 million into the city’s economy.

“The Giants’ Super Bowl victory was an incredible win for our city — and [the] ticker tape through the Canyon of Heroes will be another big win for New Yorkers and our small businesses,” he said.

The Downtown Alliance distributed thousands of pounds of confetti — donated by a Brooklyn recycling center — to buildings along Broadway. After the parade, the confetti will be swept up and brought back to the recycler.

There was a heavy police presence downtown from the early hours, with metal barricades lining Broadway and sanitation trucks and NYPD vans parked down several side streets.

(Sources: NY Post / NY Daily News)