Obstruction Heights Rooftop Modeling Flight

Obstruction Heights Rooftop Modeling requires three flights: a mapping flight and two orbital flights.

Modeling flights with the added "obstruction heights" deliverable should be as follows:

MAPPING FLIGHT

Image captured during a mapping flight.Image captured during a mapping flight.

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)

Gimbal pitch:
Nadir (straight down)
-90 degrees from horizon

Overlap:
80-85% front overlap, 80-85% side overlap

Flight area:
The flight path should cover the entire site with a grid flight pattern

Flight pathFlight path

Flight path

ORBITAL FLIGHT

Sample image from an orbital flightSample image from an orbital flight

Sample image from an orbital flight

Flight 1

Altitude:

  • One set of orbital images at ~100 ft above the rooftop

Gimbal pitch:
Approx. 30 degrees facing toward the center of the site
Do not include any sky in the view or image

Flight area:
Flight should be flown in a circle around entire perimeter of site; fly elliptically for longer rectangular buildings

Flight 2

Altitude:

  • One set of orbital images at ~150 ft above the rooftop

Gimbal pitch:
Approx. 45 degrees facing toward the center of the site
Do not include any sky in the view or image

Flight area:
Flight should be flown in a circle around entire perimeter of site; fly elliptically for longer rectangular buildings

OBLIQUE FLIGHT

Altitude:
76.2 to 91.4 (250 to 300 feet) above ground level (AGL)

Gimbal pitch:
Oblique, -15.0 to -45.0 from horizon

Flight area:
6.1 hectares (15 acres) per mission
Approximately 3 megawatts or less

Inner Facing Images:
Typically 8 image captured at 130 m (600 ft) radius from the center in 8 principal compass directions.

Outer Facing Images:
Typically 8 image captured from the center of the site in 8 principal compass directions.