The New York Police Department produced a detailed analysis in 1998 opposing plans by the city to locate its emergency command center at the World Trade Center, but the Giuliani administration overrode those objections. The command center later collapsed from damage in the Sept. 11 terrorist attack.

“Seven World Trade Center is a poor choice for the site of a crucial command center for the top leadership of the City of New York,” a panel of police experts, which was aided by the Secret Service, concluded in a confidential Police Department memorandum.

The memorandum, which has not been previously disclosed, cited a number of “significant points of vulnerability.” Those included: the building’s public access, the center’s location on the 23rd floor, a 1,200-gallon diesel fuel supply for its generator, a large garage and delivery bays, the building’s history as a terrorist target, and its placement above and adjacent to a Consolidated Edison substation that provided much of the power for Lower Manhattan.

Rudolph W. Giuliani, the mayor then, has acknowledged some police skepticism about the site, but he has described it as resulting from a jurisdictional dispute between police officials and his emergency management director, who had played a role in selecting the site.