Use of LiDAR (Light Detection and Ranging) mapping and high
accuracy photogrammetry applications are rapidly increasing. UAVs with GPS are
more cost-effective for aerial HAP survey compared to manned aircraft with traditional
photogrammetry. These drones now contain cameras and small computers making
survey accuracy down to the centimeter possible.
Learn more about drone mapping technology and industries
benefiting from UAVs.
What Is UAV High Accuracy Photogrammetry?
High accuracy photogrammetry
(HAP) survey involves the science of making measurements from photographs. It
creates an output of a map, drawing, or 3D model of a land mass or object.
To create 3D maps from aerial photogrammetry, the camera is
mounted on a UAV pointed toward the ground. If measuring a statue or monument,
the camera is mounted horizontally on the drone.
As the UAV flies along a programmed flight path called a
waypoint, multiple overlapping photos of the model or ground are taken at a
rate of 80-90%. This rate of overlap would be impossible based on pilot
navigation alone. Waypoint navigation technology is essential for a UAV to
achieve 80-90% overlap accuracy.
The Basics of LiDAR and Drone Mapping
With UAV LiDAR, a laser scanner is mounted on a UAV to
measure the height of objects in the landscape below. These scanners can
capture hundreds of square miles in a single day.
By achieving accurate measurements, 3D models can be created
for design, planning, and decision making processes throughout many industries.
LiDAR sensors are especially useful in agriculture where they can pierce dense
canopy and vegetation, making it possible to capture the earth at a higher
accuracy than satellites.
With UAV HAP survey
and LiDAR mapping, many products can be created from aerial imagery, including:
·
3D building models
·
Contour maps
·
Surface models
·
Geospatially corrected aerial images
(orthophotos)
·
Volumetric surveys
Precision 3D images can benefit the following industries by
increasing efficiency and reducing costs:
·
Archaeology
·
Cellular network planning
·
Coastline management
·
Flood modeling
·
Forestry management and planning
·
Oil and gas exploration
·
Pollution modeling
·
Transport planning
·
Urban planning
·
Quarries and minerals
Top DJI UAVs for 3D Mapping and High Accuracy Photogrammetry
·
DJI Mavic
Pro: Perfect for HAP survey and LiDAR mapping applications. Flight control
and stabilization allows this quadcopter to fly still and create accurate point
clouds and 3D maps with software.
·
DJI
Matrice 100: With DJI’s easy-to-fly technology, this drone has additional
expansion bays for cameras, infrared sensors, and LiDAR scanners for 3D maps.
Enhanced GPS allows for high accuracy photogrammetry.
·
DJI
Phantom 4 Pro: Uses dual navigation and flies perfectly smooth. It has a 4k
camera and uses waypoint navigation. The Phantom 4 is one of the most popular
quadcopters for 3D imaging.
·
DJI
Phantom 3 and Inspire 1: These models now have waypoint navigation and can
be used for photogrammetry. The best software to use with DJI drones is the
Pix4Dmapper Mesh DJI edition.
Other Popular UAVs for Photogrammetry
·
SenseFly
eBee Pro Mapping UAV: A fixed-wing, fully autonomous drone which captures
high-resolution aerial photos for 2D orthomosaics and 3D models. It can cover
4.6 miles in a single flight and comes with two software packages: eMotion and
Postflight Terra 3D.
·
3DR X8-M
Drone for Aerial Mapping: Includes a quadcopter, Canon high-resolution 12
MP digital camera, and Pix4DMapper software for rendering photos into 3D maps.
This drone offers the right balance of technology for precision aerial maps and
surveys.
·
3DR
Aero-M Fixed Wing UAV: This is the all-in-one solution for high-resolution
visual-spectrum aerial maps. You can acquire detailed data for large-scale
operations such as construction, farming, search and rescue, and conservation.
Includes the Canon S100 high-resolution 12 MP camera.
At Insitu, we offer services and software solutions for
commercial and military UAV. Contact us
to learn more.
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