CoStar, a real estate data provider is in talk with Google to integrate its vast stores of building information with the Google Earth interactive satellite mapping service. The company also in preliminary talks with Yahoo, its CEO said.

The company tracks more

than 200 bits of data on commercial buildings in the 80 or so biggest markets in the United States and plans to expand to the top 200 markets. It also has operations in the United Kingdom.

CoStar sends out teams in specially equipped vans to photograph buildings and use lasers to measure them and calculate their exact centers for mapping.