Capturing Orthomosaics

 

 

Unless the site is a large utility-scale solar site (>10MW), or there are airspace restrictions preventing a high-altitude flight, we recommend the pilot captures orthomosaic/ base layer imagery. To capture an orthomosaic / base layer imagery, follow these guidelines.

 

Orthomosaic Imagery Requirements

 

Equipment

Drone: Capture with a multi-copter UAS with gimbal mounted camera. A DJI Phantom 4 Pro is a good drone for this purpose but other drones are acceptable as well, see the table below.

High-resolution camera: 4000×3000 pixel (12 MP) resolution minimum as provided by, for example, the Phantom 4 or Mavic 2 cameras.

Relative position accuracy:
Horizontal: 1.5 m Vertical: 0.5 m.

Absolute position accuracy:
Horizontal: 5 m Vertical: N/A.

Make

Model

Camera

Flight Mission

DJI
Phantom 4
Built-In
Ortho, Orbital
DJI
Phantom 4 Pro
Built-In
Ortho, Orbital
DJI
Phantom 4 Pro V2
Built-In
Ortho, Orbital
DJI
Phantom 4 RTK
Built-In
Ortho, Orbital
DJI
Inspire 1
Zenmuse X3, Zenmuse X5*
Ortho, Orbital
DJI
Inspire 2
Zenmuse X4S, Zenmuse X5S with 15mm DJI Lens
Ortho, Orbital
DJI
M200
Zenmuse X4S, Zenmuse X5S with 15mm DJI Lens
Ortho, Orbital
DJI
M210 RTK
Zenmuse X4S, Zenmuse X5S with 15mm DJI Lens
Ortho, Orbital
DJI
M200 V2
Zenmuse X4S, Zenmuse X5S with 15mm DJI Lens
Ortho, Orbital
DJI
M210 RTK V2
Zenmuse X4S, Zenmuse X5S with 15mm DJI Lens
Ortho, Orbital
DJI
M300
P1
Ortho, Orbital
DJI
M600
Please Ask for More Information
Ortho, Orbital
DJI
Mavic
Built-In
Ortho, Orbital
DJI
Mavic 2 Pro
Built-In
Ortho, Orbital
DJI
Mavid 2 Enterprise
Built-In
Ortho, Orbital
DJI
Air 2S
Built-In
Ortho, Orbital
Sensefly
Ebee Classic
S.O.D.A
Ortho
Sensefly
Ebee Plus
S.O.D.A
Ortho
Sensefly
Ebee X
S.O.D.A 3D, Aeria X, S.O.D.A
Ortho
Parrot
ANAFI
Built-In
Ortho, Orbital
Parrot
ANAFI USA
Built-In
Ortho, Orbital
Autel
Evo II
Built-In
Ortho, Orbital
Autel
Evo II Pro
Ortho, Orbital
Autel
Evo II RTK
Ortho, Orbital
Skydio
X2
Built-In
Ortho, Orbital

Ground Sample Distance

5 ± 1 cm/pixel.

 

Altitude

400 feet (AGL).

 

Image Resolution

4000×3000 pixels or greater.

 

Field of View

50 degrees or greater.

 

Gimbal Pitch

Nadir (straight down) with deviation up to 10 degrees acceptable (to avoid glare).

 

Overlap

70% front overlap (direction of flight) and 70% side overlap.

 

Image Alignment

For orthomosaic flights, pilots do not have to adjust the sensor to maintain heading throughout the flight. The sensor can turn to face each next waypoint without causing issues during data processing.

 

File Format

JPEG
Metadata must contain GPS location, relative altitude, gimbal pitch, gimbal yaw, gimbal roll and timestamp.

 

Image Quality

Imagery must be free from motion blur.
Imagery must contain minimal glare.

Environmental Conditions

Skies are clear and sunny or slightly overcast.

Irradiance greater or equal to 600 Watts per square meter.

*We recommend irradiance meter use to confirm sufficient irradiance.

If requested, pilots will be required to supply Raptor Maps with images proving POA irradiance from a sensor. If pilots cannot prove irradiance was above 600 Watts per square meter throughout the flight, a reflight will be required.

Humidity ideally less than 60%.

Wind below 6.7 m/s (15 MPH).

Sample image captured during mapping flight.