Pictometry is a patented aerial survey technique for producing oblique georeferenced imagery showing the fronts and sides of buildings and locations on the ground.
Photos are captured by low-flying airplanes, depicting up to 12 perspectives (shot from a 40-degree angle) as well as an orthogonal (overhead) view of every location flown.
Pictometry imagery can be overlaid with various shapefiles and GIS information because every pixel is georeferenced to its exact location on the earth.
[2] This allows pictometry imagery to be integrated into many existing GIS software applications[3] for use in many businesses, while creating a much richer database of the real world.
[4] Measurements that can be made directly on pictometry imagery include area, distance, height, elevation, pitch, and bearing, among others.