System and process for roof measurement using aerial imagery

A process for determining attributes of a roof structure of a real-world three-dimensional building, comprising the acts of:

• Providing at least one computer input field for a user to input first location data generally corresponding to the location of the building;
• Providing visual access to an oblique image of a region including the roof structure of the building corresponding to said first location data;
• On the oblique image of the region, providing a visual marker that is moveable on said computer monitor around said region, said visual marker initially corresponding to said first location data, wherein said visual marker may be moved to a final location on top of the building to more precisely identify the location of the building roof structure, the final location having location coordinates;
• Providing a computer input capable of signaling user-acceptance of the final location of said marker;
• and,
• Providing visual access to one or more images of an aerial imagery database corresponding to location coordinates of the final location.