How to plan a 3D Photogrammetry Mission: Double Grid
While the Propeller Platform works best with 2D photogrammetry missions, there are certain cases where a 3D photogrammetry mission produces more actionable results.
1. To begin, power on your controller using the GS RTK app
2. Connect to a WiFi network or hotspot to ensure base maps will load to assist with mission planning .
3. From the GS RTK main menu, tap Plan in the bottom left corner.
Planning a Double Grid Mission
1. Tap 3D Photogrammetry (Double Grid).
2. Locate your site by panning around the map and using two fingers to adjust the zoom.
3. Drop a pin to start creating your survey area by tapping on the screen on the boundary of the site.
Note: the flight path will go outside of the set site boundary.
4. Drop a minimum of three pins to produce a survey area. To move a pin, tap on it again to select it, then either use the wheel on the right or drag it around with your finger. You can delete the selected pin by tapping the trash icon or by double-tapping on the pin.
5. Display the mission settings by tapping on the white tab on the right side of the screen after completing your survey area.
The settings listed below are good guidelines to follow when planning 3D double grid photogrammetry missions.
Note: these settings are very similar to 2D photogrammetry missions, except for the gimbal angle.
To learn more about optimal flight settings, please see our drone pilot guides.
6. Tap Save and give your task a name.
Tips for Flying 3D Photogrammetry Missions
- Fly a 2D photogrammetry mission to cover the whole site first.
- Fly a 3D photogrammetry mission at roughly 15-20m lower than the 2D mission. This is to get slightly higher ground resolution.
- Only fly the 3D mission over the areas of interest on your site. There's no need to do the whole site, i.e. don’t waste your time by flying flat areas.
- Your flight still needs to be at least 10min long to get good GPS positioning data.
After you fly the mission, upload your data to Propeller. The most common use of 3D 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 3D missions, please contact Propeller support.
I still can't do it!
We wrote these articles to arm 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 our support team by emailing email@example.com.