Historic Aerials – Aerial Photography From the Past to the Present
http://www.historicaerials.com/

HistoricAerials.com by NETR Online, a division of Nationwide Environmental Title Research, LLC, provides free online access to historic and current aerial photographs. You can view aerial photography taken from the 1930s through today. Our multi-year comparison tools will enable the viewer to quickly recognize historical changes in a specific parcel of land or the surrounding area of a property. Historic Aerial photography has many different uses. Because it provides data and a perspective that is otherwise elusive, there are applications in academic research, resolving legal disputes, tracking genealogy, planning real estate development, and much more. Government agencies, construction contractors, financial investors, legal professionals, and environmental businesses use aerial photography quite extensively when performing:

» Environmental due diligence and site assessments
» Allocation of environmental liability
» Reclamation obligations
» Historical site documentation
» Vegetation growth tracking
» River and runoff trends

Historic Aerial Photos have been amassed by several government organizations such as the United States Geologic Survey (USGS), the Department of Natural Resources (DNR), the United States Department of Agriculture (USDA), as well as numerous private organizations. Historic Aerials.com has revolutionized the storage and ease of access to these types of photographs with the use of Geographic Information Systems (GIS). GIS is a way to store data geo-spatially; that is, to reference data such as parcel boundaries, rivers & streams, contours, even sewer lines to a point on the earth, and represent these in a dynamic three-dimensional model. Formerly, these photographs were stored in large books and archived at federal, state, and county offices as well as warehoused at private companies. Many times particular groups did not include the entire city or county, and often these were flown at different altitudes and at irregular intervals. This lack of continuity is fertile ground for the spatial database structure of GIS. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This has been added to Business Intelligence Resources Subject Tracer™ Information Blog. This has been added to Reference Resources Subject Tracer™ Information Blog.