Pix4D

Overview #

Learn how to process your missions and geotagged photos in Pix4D.

Process #

1. Start a new project and load in the images
2. In image properties make sure the coordinate system is set to EPSG 4326 and the Vertical Coordinate System is set to “Geoid Height Above WGS84 Ellipsoid.”
3. Select all the images that are 1s. (Use the Event Position .csv file to verify the information.) They should correspond with the image number, if using a system other than DJIs you can select all the images starting with the first image and rename them which will add an image number starting at 1.
4. Set the geolocation accuracy to Custom.
5. Right click the Accuracy Horizontal(m) cells and change all selected to 0.04m.
6. Right click the Accuracy Vertical and change all selected to 0.04m.
7. Repeat the process for the 2s, but change the accuracy to 1.5m.

Add in the Calibration Panel #

1. Open GCP/MPT Manager within the Pix4D software.
2. Open the event position files and find the first or last image that was taken of the calibration panel.
3. Click “Add Point” and copy the Latitude and Longitude.
4. Enter “Calibration Panel” for the label.
5. The altitude should have 0.04m subtracted from it, then add that value to the altitude box.
6. Use the basic editor to select all the images with the ground control points. Do this as accurately and zoom in as much as possible.

Additional Settings #

To help clean up the data, under the Processing Options section “Minimum Number of Matches” change the default value from 3 to a value of 6. This will reduce the visual noise from the project.