Once your project is created and you're on the home screen, you can start processing your imagery. If you need to update information about the images before processing, use the Flight Data tab.
You can view or edit the following information in the Geolocation group:
- Change the source of the images GPS data.
- Adjust the altitudes of the images.
- Export GPS data.
Set GPS source
The GPS source is set during project creation but can be updated from the Flight Data tab. Drone2Map allows you to set the GPS source for selected images in the project. To set the GPS source images, complete the following steps:
- Select one or more images.
- Click GPS Source .
- Follow the steps to add a geolocation file.
Adjust image altitudes
Drone2Map reads image altitude information from the image EXIF data or from an external file. You can view altitude information in the Images Table. If you are not confident in the accuracy of the altitude values for your images, you may want to update your altitudes using the flying height you set during mission planning. To do this, Drone2Map queries a user-defined elevation source to establish the ground elevation for each image center and adds the flight height value you input to establish new altitude values. To adjust your image altitudes, complete the following steps:
- Click Image Altitude .
- Select the elevation source type from the Adjust using drop-down list. Select Digital Elevation Model if you have a local DEM dataset, Constant Elevation, or leave the default Elevation Service.
- If your drone collects height above ground metadata, the Use Metadata check box will be active and data from your drone will be used.
- If the Use Metadata check box is disabled, input the flight altitude as height above ground and the units.
- If you selected Constant Elevation, input the takeoff elevation and units.
- If you selected Elevation Service in step 3, leave the default service or uncheck the check box and input your own elevation service. If you selected Digital Elevation Model in step 3, browse to your local elevation file (.tif, .jpg, .jpeg, .jpe, .jfif, or .png) and open it.
- Click OK.
A message appears indicating that your altitudes will be set to the elevation retrieved from the elevation source plus your input height. Click OK to proceed.
To export all image information in TXT or CSV format, complete the following steps:
- Select images.
- Click Export GPS.
- Choose a location on your local file system to save the file.
- Click Save.
If you experience issues with the GPS data stored in image EXIF data, you can use the Export tool to save the image information to a file, edit the data, and add the image information back to Drone2Map using the GPS Source tool. For example, locations in the southern hemisphere and western hemisphere include a minus sign (-), which represents a negative number.