AeroPoint data and the associated flight imagery can be processed and output onto a local grid for seamless data matching. The data collection process is split into three different phases:
On-site (planning phase)
Inform the site you are flying that they will need to set up two accessible control points (one to use and one for backup, in case the first in inaccessible at the time of the flight). To do this:
- Place a pin in the ground and have the top of the pin flush with the dirt level. Survey the exact center of the top of the pin with the rover in the site's local grid.
- Use an AeroPoint stencil or other stencil to spray-paint a marker on the ground. Tip: You can spray-paint the edges of the AP stencil to make sure you can center the GCP.
**Note: You have the option to shoot the top of an AeroPoint during the data capture, though it's easier to use an established point, especially moving forward. (You can use the same site control point for every flight.)
Once these control points have been set up, you will need the calibration file used for this local site. This can be a .DC or .CAL file (which can be used to generate a JXL in Trimble Business Center) or a .JXL file.
On-site (right before the flight)
When you're ready to fly the site, follow these steps:
- Lay the first AeroPoint on one of the surveyed control points mentioned above. Be sure the bottom of the point is flush with the pin/dirt.
- Make sure to remember which control point you've placed the AeroPoint on as this point will act as our known point to tie into the local grid.
- Lay out the rest of the AeroPoints as shown here.
- Fly the site, making sure to capture the AeroPoints in the aerial imagery.
- Collect AeroPoints in reverse order.
Following the Flight
Once your AeroPoints have finished collecting data, upload their data to your user portal. In order to process this data, you will need to create a site and Set Up a Local Site Calibration from the Trimble JXL file.
If you have a Propeller Platform license, you can upload an aerial survey to the Platform.
If you do not have a software license, you can process your AeroPoint data using the Local Grid method to output data using the site coordinate reference system. We will select the AeroPoint placed on the surveyed control point on site as the known point and enter its location based on the original control point.
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 data success team may be able to help. You can contact our support team by clicking the support tab on the top-right pane of your user portal.