Radius Maps

EDR's industry-leading Radius Map Report satisfies ASTM E1527-05 and the EPA’s All Appropriate Inquiry rule.


Sanborn Maps

This essential source of Phase I historical information gives you access to nearly 1.3 million Sanborn Maps.


Historical Aerials

Maximize your historical aerials results with nationwide coverage from a variety of authoritative sources.



Topographic Maps

EDR's search of topographic map collections helps you evaluate a property's potential liability resulting from past activities.


City Directories

City Directory

An invaluable Phase I assessment tool that accesses detailed information for a property and its nearby properties at five-year intervals dating back to the 1800s (where available)