Before planning an oblique mission, please contact your Propeller customer success engineer. Vertical face imagery is a feature that must be turned on before uploading your data to the platform.
While the Propeller Platform works best with standard 2D missions, there are certain cases where an oblique mission produces results that more accurately represent the actual conditions of your site, like vertical construction progress. In these situations, we recommend flying an oblique area route mission. An oblique area route mission involves flying a main flight path to collect nadir photos in addition to multiple subpaths facing towards the center of the site to collect oblique photos. Keep in mind that this method requires more flight time and battery power than a standard 2D Area Route mission of the same site.
With the DJI Pilot 2 app (Matrice 300/350 RTK and Mavic 3 Enterprise), it’s also possible to combine Mapping and Oblique data collection into one flight path by enabling the Smart Oblique option on a mission. However, this option is only recommended if time/battery constraints prevent you from flying a full Oblique mission, as it produces less than optimal data.
Oblique Mission Planning
1. Power on your remote controller, ensure that you’re connected to WiFi, and enter the DJI Pilot 2 app.
2. From the DJI Pilot 2 main menu, tap Flight Route.
3. Tap +, then Create a Route.
4. Tap Area Route.
5. Locate your site by panning around the map and using two fingers to adjust the zoom.
6. Tap along the boundary of your site to create a polygon encompassing your mission area. You can tap and drag existing points along the edge to fine-tune the boundary.
7. Once your polygon boundary is set to your mission area, tap the blue circle/check mark at the top left to configure your mission settings.
8. Select the appropriate camera type for your mission and tap OK.
9. Review the table below to ensure your mission settings align with our recommendations and your use case.
10. Tap the save icon on the left side of the screen to save your mission.
Now that your mission is saved, set the camera specific settings.
1. Tap on the camera preview box at the bottom left corner of your screen to switch to camera view.
2. Select the camera settings menu button.
3. Ensure that the camera is set to capture single photos. If it’s set to Video, tap the toggle switch on the right side of the screen below the menu button to switch it back to Photo mode.
4. We recommend the settings listed below when planning Oblique missions. These settings are the same as those used for a 2D mission.
In winter or low light conditions, there are special considerations to make. You may need to slow down the flight speed of your drone to less than 10m/s and adjust the shutter speed to 1/800 or 1/500 to allow enough light to hit the sensor.
Failure to do this can result in a high ISO and will reduce the quality of the images you capture.
Mavic 3 Enterprise Settings:
Double-check your settings in the Preflight Checklist and ensure Dewarping is turned ON for best results when using the Mavic 3 Enterprise. The Preflight Checklist will appear when you start your mission.
Matrice 300/350 RTK Settings:
These camera settings are independent of the mission settings and will be saved to your drone, but it’s still a good practice to verify the settings before each flight.
See our best practices for drone surveying to learn more about optimal flight settings.
Tips for Flying Smart Oblique Mapping Missions
- Only fly a Smart Oblique Mapping mission if time and/or battery constraints prevent you from flying a full Oblique mission.
- Fly a standard Mapping mission to cover the entire site first.
- Only fly the Smart Oblique mission over the areas of interest of your site if there is no need to do the entire flight. For example, don't waste time flying flat areas.
- Your flight needs to be at least 10 minutes long, per battery, to obtain good positioning data.
- The most common use of Oblique missions is to produce clear and detailed images of vertical features, such as a pit wall or building facade. If you have questions about when and how to use Oblique missions, please contact Propeller Support.
I still can't do it!
We wrote these articles to equip you with everything you need to get the job done on your own, but we understand that sometimes this isn't sufficient.
If you're stuck, the Propeller hardware support team may be able to help. You can contact them by emailing firstname.lastname@example.org.