Rooftop modeling requires two flights: a mapping flight and an orbital flight.
Drone: Capture images with a multi-copter UAS with gimbal mounted camera. A DJI Phantom 4 Pro is the preferred drone for this purpose.
High-resolution camera: 5472×3648 pixel (20 MP) resolution minimum as provided by, for example, the Phantom 4 Pro or Zenmuse X4S cameras.
Images must be JPEG and contain metadata (GPS location, relative altitude, gimbal pitch, gimbal yaw, gimbal roll and timestamp)
Image captured during a mapping flight.
Resolution & altitude:
2 cm/pixel (.8 in/px) at rooftop level
Approximate altitude: 91.4 m (300 feet) above ground level (AGL)
Example: For a building 45 ft tall (13.7 m), approximate AGL of 300ft (91.4 meters)
Nadir (straight down)
-90 degrees from horizon
75% front overlap, 75% side overlap
The flight path should cover the entire site with a grid flight pattern
Sample image from an orbital flight
- One set of orbital images at 100 ft above the rooftop
- Second set of orbital images at 250 ft above the rooftop
- Third set of images at approx. 180 ft above rooftop recommended for sites with surrounding trees
Approx. 30 degrees facing toward the center of the site
Do not include any sky in the view or image
Flight should be flown in a circle around entire perimeter of site; fly elliptically for longer rectangular buildings
Updated 23 days ago