In this post we take an overall look at this technology and the sectors benefiting from using UAVs for photogrammetry and lidar mapping. We also discuss the drones on the market and the compatible software. Another closely related sector is using LiDAR mounted onto drones. It’s another growing sector and you can read further regarding drone LiDAR use here.
The use of quadcopters and multirotors in photogrammetry and lidar mapping is still in the very early stages. There are many terrific opportunities in various sectors. Now is the best time to learn about UAVs, photogrammetry, 3D and lidar mapping.
If you are interested in pursuing a UAV photogrammetry business or similar, buy the best quadcopter and sensors you can. There will be many opportunities for owners with quality UAV lidar and photogrammetry equipment.
What Exactly Is UAV Photogrammetry
Photogrammetry is the science of making measurements from photographs. The output of photogrammetry is typically a map, a drawing or a 3D model of some real-world object or land mass.DJI Ad
3D Maps And Models
To create 3D maps from aerial photogrammetry, the camera is mounted on the drone and is usually pointed vertically towards the ground. Using photogrammetry to create 3D models of monuments or statues, the camera is mounted horizontally on the UAV.
Multiple overlapping photos (80 to 90% overlap) of the ground or model are taken as the UAV flies along an autonomous programmed flight path called a waypoint. To overlap photos of an object or land by 80 to 90% would be impossible to complete accurately by pilot navigation. It is essential to have a UAV which has waypoint Navigation technology.
UAV Lidar Mapping Explained
UAV Lidar involves mounting a laser scanner on a UAV to measure the height of points in the landscape below the UAV. Lidar actually means (Light Detection And Ranging). Lidar scanners can capture hundreds of square kilometers in a single day. By measuring 10-80 points per square meter, a very detailed digital model of a landscape can be created.
The accuracy of the measurements allows the 3D models created to be used in any planning, design, and decision making processes across many sectors.
Lidar sensors can also pierce dense canopy and vegetation, making it possible to capture bare earth structure that satellites cannot see, as well as ground cover in enough detail to allow vegetation categorization and change monitoring.
Photogrammetry And Lidar Uses
Through the use UAV photogrammetry and lidar mapping, there are many products which can be extracted from the aerial imagery. These products include:
- DEM / DTM / DSM (surface models)
- Orthophoto’s (geospatially corrected aerial images)
- 3D Building Models
- Contour Maps
- Planemetric features (road edges, heights, signs, building footprints, etc)
- Volumetric Surveys
Here are some of the best uses of lidar and photogrammetry. All of these sectors benefit for having precision 3D images of their projects. They also benefit with increased efficiency and reduced costs than using traditional aircraft.
- Forestry Management and Planning
- Flood Modelling
- Pollution Modelling
- Mapping and Cartography
- Urban Planning
- Coastline Management
- Transport Planning
- Oil and Gas Exploration
- Quarries and Minerals (Volumetrics and Exploration)
- Cellular Network Planning
Photogrammetry is starting to take a back seat with lidar sensors on UAVs now being more widely used.
3D Vegetation Modelling
NOTE: Vegetation Modelling uses multispectral sensors and lidar sensors rather than photogrammetry sensors.
Cameras For Photogrammetry And 3D Mapping
There are several drones with cameras which are ready made for 3D Mapping. In reality, any drone equipped with an intervalometer on the camera would be suitable. An intervalometer triggers the camera shutter. A minimum photo capture would be 1 photo every every 2 seconds. The below cameras all work well for photogrammetry and Mapping.
- Canon Cameras – S110, SX260
- Sony Cameras – QX1,DSC-RX100 A7R, A7, A7S, NEX-6, NEX-5R, NEX-5T, A5100
- Panasonic Cameras – GH3
GoPro camera lenses are not great for creating aerial maps. To get some sort of decent results, you would have to be flying higher than 400 feet (approx 120 meters).
Also, the integrated cameras on the DJI drones such as the Phantom 3, Phantom 4 and Inspire 1 will allow you to capture photogrammetry images. More information below on DJI.
Photogrammetry Best Practice
From the Art Of Photogrammetry – If the photos aren’t good, then it’s going to put a ceiling on the quality of your 3D model, no matter how good the software is. The photos should be as clear as possible. If you were to zoom in on your aerial photos, are the small features blurry. If so try to figure this the reason and your 3D images will improve immensely.
Eliminate everything standing in the way of maximum sharpness. This is where more megapixels actually matters. Shooting in RAW definitely helps.
Lighting is always important in photography. Bright, even lighting will allow you to have a small aperture to reduce the image’s depth of field. Shallow depth-of-field is actually a bad thing for photogrammetry, because blurred details confuse the software. Our goal is to have high-detail, sharp, and flat imagery.
That requires closing up the aperture, which means you need more light. Good lighting will also allow you to lower the ISO which will reduce grain, and it will allow you to have a high shutter speed which reduces motion blur.
Give the software only high resolution information. If you are mapping a sculpture or building and don’t need the background, then mask it out.
If one image is off or not aligning correctly with the images before and after it, then delete this image. In many ways, you’re smarter than the software which will be stitching the images together. Filtering out bad or off line photos before the software gets to work, will make the 3D photogrammetry software as smooth as possible.
If its not in the picture, then It’s not in your mesh and 3D image. Make sure you have the coverage you need to get all the details you want, because it’s difficult to go back and re-shoot in the exact same conditions.
If you are new to the world of photography, here is a terrific article with on aerial photography tips.
UAVs For Photogrammetry And 3D Mapping
DJI Photogrammetry Drones
DJI Matrice 100 Customizable UAV
The Matrice 100 platform has all of DJI’s easy-to-fly technology built in. It includes the flight controller, propulsion system, GPS, DJI Lightbridge, a dedicated remote controller, and a rechargeable battery. It has additional expansion bays allowing you to add components such as cameras, infrared sensors and LiDar scanners used to create complex 3D Maps.
The Matrice 100 has enhanced GPS with allows for highly accurate photogrammetry. The enhanced GPS also allows you to track the Matrice 100’s position in real time, while enabling faster satellite acquisition, more accurate position holding and flight planning.
DJI Phantom 4 For Photogrammetry
The Phantom 4 released in Spring 2016 can use the Pix4Dmapper Mesh DJI edition which is mentioned further down this article. This first videos shows you how to create 3D Model using the DJI Phantom 4 and the Photogrammetry mapping Agisoft PhotoScan software.
DJI Phantom 3 And Inspire 1 Photogrammetry
In September 2015, a firmware and software update gave the DJI Inspire 1 and Phantom 3 models waypoint navigation and can now be used for photogrammetry. This next video gives a demonstration of using the Drone Deploy Mapping software to create 3D maps with a DJI Inspire 1, Phantom 3 and Phantom 4 drone.
The best software to use with DJI drones is the Pix4Dmapper Mesh DJI edition. They DJI Phantom 3 and Inspire 1 can also used the Altizure app for photogrammetry. More information on the Pix4DMapper and Altizure for 3d mapping and modelling below.
DJI Spreading Wings S1000 For Mapping
The Spreading Wings S1000 model can be customized to carry many different types of cameras and sensors including those mentioned above which are ideal for photogrammetry and mapping. In choosing a camera, you need to have a matching gimbal to carry the camera. DJI are world leaders when it comes to drones, gimbal and camera stabilization.
DJI Ground Station With Photogrammetry
With the DJI Ground Station, there is photogrammetry software which can be used to produce professional and accurate mapping. The Phantom 2 Vision and Vision+ have the Ground Station built into the Vision App. For the Phantom 2, the Ground Station with photogrammetry tool can be purchased. That has now changed.
Special Note: On December 12, 2015, Google stopped supporting Google Earth and DJI’s PC Ground Station software is based on the Google Earth API. This means that DJI have discontinued support for their PC Ground Station.
2 of DJI’s products, the Ace One WP flight controller and 900M Datalink, both of which rely on the PC Ground Station software also ceased to be functional. This also affected the 2.4GHz Bluetooth Datalink’s PC Ground Station functionality will also ceased to be functional. However the iPad Ground Station functions are not affected.
Other UAVS For Photogrammetry
SenseFly eBee Pro Mapping UAV
The eBee mapping UAV is a fixed wing, fully autonomous drone which captures high-resolution aerial photos that you can transform into accurate 2D orthomosaics and 3D models. The eBee can cover up to 12 square kilometers (4.6 square miles) in a single flight, and over smaller areas, flying at lower altitudes, it can acquire images with a GSD of down to 1.5 cm/pixel.
The eBee comes with two software packages: eMotion (flight planning and control) & Postflight Terra 3D (professional photogrammetry).
3DR X8-M Drone For Aerial Mapping
The 3DR X8-M comes as a full package which includes the quadcopter, the Canon high resolution 12 MP digital camera and also the Pix4DMapper 3rd edition software required for rendering the photos into 3D maps. The 3DR X8-M has GPS, autonomous waypoint navigation, repeatable flight paths and is perfect for precision aerial maps and surveys. The X8-M is one of the easiest UAVs to plan and program autonomous missions and creating 3D photogrammetry maps.
Unfortunately the X8 models are now end of life with 3DR. Their SOLO drone reviewed a little further down is now adaptable for photogrammetry.
3DR Aero-M Fixed Wing UAV
The Aero-M is an all-in-one solution for creating high-resolution visual-spectrum aerial maps. It’s the perfect platform for acquiring highly detailed data for large-scale operations such as farming, construction, conservation, as well as search and rescue and emergency response. the Aero-M has a lightweight and tough foam frame.
The Aero-M package includes a Canon S100 high-resolution 12 MP camera, the powerful Pix4Dmapper LT 3DR Edition software which is used to create highly accurate, georeferenced and orthorectified mosaics.
View the last video below to see how easy it is to plan an autonomous mission with the Aero-M and also to create a 3D maps of a large area.
The 3DR SOLO drone was released in 2015 and designed specifically for the GoPro Hero 4 camera. The SOLO drone can now be used to create 3D Maps using the Pix4Dmapper mesh software. You can read more about this Pix4Dmapper mesh software below.
This year, 2016, 3DR released the Site Scan solution. This enables the Solo drone to collect high-quality 2D and 3D geotagged aerial data. It’s available now with the GoPro HERO4 Black camera and later this year with the Sony UMC-R10C.
The price for the 3DR Solo quadcopter with gimbal is as low as USD $378 at the time of writing. However, 3DR have discontinued manufacturing the SOLO drone and will concentrate on their Site Scan and other products.
Trimble UX5 UAV
The Trimble UX5 ensures optimal image quality along with maximum photogrammetric accuracy. The UX5 camera has a large imaging sensor which captures very sharp, color-rich images, even in dark or cloudy conditions. The 24 MP camera and its custom optics give the UX5 the ability to capture data down to 2.0 cm (0.79 in) resolution.
The design of the Trimble UX5 means it can fly in practically all weather conditions.
Aeryon Scout Map Edition Quadcopter
The Aeryon sUAS is designed for any application that requires survey-grade accuracy orthomosaics, DSMs and point clouds from aerial or oblique imagery – and seamless integration with GIS, CAD, and traditional photogrammetry software. The Aeryon Map Edition includes the Aeryon SkyRanger sUAS, the integrated imaging payload for image capture and Pix4Dmapper software to enable field and office image processing, including integrated tools for 3D output visualization and editing.
Drone Photogrammetry Software
Pix4Dmapper Mesh – DJI Special Edition
The Pix4Dmapper Mesh software has a special edition for DJI drones. The Mesh software automatically converts images into 3D models. You can also get a preview of the 3D model or map on your phone within one hour after landing. Then using the desktop software, you can edit and optimize your 3D models.
There is so much more you can do with this Mesh software including measuring lines and surfaces, create fly through videos and export the model in full 3D textured mesh and video format. You can rent the Pix4Dmapper Mesh software annually which includes all free updates.
This Pix4Dmapper Mesh DJI Edition works with the Inspire 1 and Phantom 3 Professional and Phantom 4 which are reviewed on this website.
Here is the full link which shows the Pix4Dmapper Mesh compatible drone camera list which is as follows:
- DJI – Phantom 2 Vision and Vision+
- DJI Phantom 3 Advanced and Professional
- DJI Phantom 4
- DJI Inspire 1
- 3DR SOLO
- Parrot Bebop 2
Altizure Free Photogrammetry Software
The Altizure app allows for fully automated 3D mapping of an area. You outline an area on the map and the app will calculate the best route to take images of the area. These images can then be uploaded to Altizure.com, where it is analyzed by its software to create a 3D render of your location (you can also animate your creation). The compatible drones are the DJI Phantom 3, 4 and Inspire 1. Altizure have a free version and also a paid for service.
Drone Deploy App
DroneDeploy has done great research and development to create an incredible surveying app. This is the “go to” app if you’re serious about orthomosaic, volumetric, 3D and agricultural NDVI surveying. This app will revolutionize automated mapping and surveying for beginners and professionals. Here is how it works;
- Easily make flight plans on any device.
- Automate takeoff, flight, image capture and landing.
- Live stream First Person View (FPV).
- Disable auto-flight and resume control with a single tap.
- Easily continue non-interrupted flights to map large areas.
UAVs Photogrammetry And LiDar Mapping Videos
This videos shows the monumental task of creating the 3D Model of the Christ the Redeemer Statue in Rio de Janeiro.
This next video comes from Tim Lucas which demonstrates how UAV’s carrying photogrammetry payloads are being used.
Below is a nice tutorial video on LiDar technology. This video shows traditional aircraft being used for LiDar mapping. However, we are already seeing that UAVs are more practical and cost effective for LiDar mapping.
This final video shows you how easy it is to create a 3D photogrammetry map of an area using the 3DR Aero-M fixed wing aircraft. With the right UAV, equipment and software, creating 3D images is pretty easy.