The source of geo-coordinate data is set on this pane. This pane only displays in PhotoModeler Premium - See Unmanned Aerial Projects. Choose from:
• Do not set geographic coordinates on Camera Stations at this time – geo-coordinates will not be used in the SmartMatch project.
• Use detected geo-location tags (EXIF) from images – use the geo coordinates stored in the EXIF header of images in the project during SmartMatch (matching and/or processing). Note that the EXIF GPS data may not be accurate, especially for small scale projects or for some cameras (especially smart phones). This feature is used in larger scale UAV/aerial projects when the GPS data is known to be accurate. Some UAV/UAS store GPS data with the images but the accuracy varies. This option only enables if the images have suitable stored GPS EXIF information.
• Assign the positions from file – browse to a file configured with the coordinates of the camera at the time photos were taken. The format of the file should be .csv, .txt, .dat, or .log and contain the relevant geo coordinate data. Although the data import can be customized using the Text File Import Filter Dialog the geo coordinates are typically structured with these columns of data: ID, Latitude, Longitude, Elevation.
• Camera Stations constrained to an approximate constant height: Constrain the camera stations to a constant altitude for UAV/drone projects when there are no GPS control positions and you are doing auto-calibration that results in a weak/curved result.
• Once the source of the geo-coordinate data is selected, the Next button will bring up the Define Geographic Coordinate System Dialog where the coordinate system’s project and datum, and units for elevation can be set.
• If you elect to NOT use geo coordinates, you can set whether to constrain the cameras to an approximate height. This can sometimes help stabilize a solution.