Four months after the tragic collapse of a wing of the 12-story Champlain Towers South residential condominium in Surfside, Fla., the Miami-Dade police gave private forensic investigators access to the site, but for measurements only.

The National Institute of Standards and Technology has added a remote sensing and visualization project to its roster of queries into the June 24 partial collapse of the Champlain Towers South residential condominium in Surfside, Fla., which killed 98 people.