EXIF Data in QField¶
When using the internal QField camera, images will be geotagged with various EXIF metadata fields. Below is a reference table listing the available EXIF tags, their descriptions, examples, and comments about their usage in QField.
| EXIF Tag | Descriere | Example | Comments |
|---|---|---|---|
| Exif.GPSInfo.GPSLatitude | The latitude of the location where the image was taken. | 47.3769 | Stored as a positive value with a reference to N/S (see below). |
| Exif.GPSInfo.GPSLatitudeRef | Latitude reference (N = North, S = South). | N | Determines whether the latitude is north or south of the equator. |
| Exif.GPSInfo.GPSLongitude | The longitude of the location where the image was taken. | 8.5417 | Stored as a positive value with a reference to E/W (see below). |
| Exif.GPSInfo.GPSLongitudeRef | Longitude reference (E = East, W = West). | E | Determines whether the longitude is east or west of the prime meridian. |
| Exif.GPSInfo.GPSAltitude | The altitude above sea level (in meters) where the image was taken. | 490 | Positive values indicate above sea level; negative values indicate below. |
| Exif.GPSInfo.GPSAltitudeRef | Altitude reference (0 = Below Sea Level, 1 = Above Sea Level). | 1 | Indicates whether altitude is above or below sea level. |
| Exif.GPSInfo.GPSImgDirection | The direction in degrees in which the camera was facing when the image was taken. | 270 | Represents the compass direction (0 = North, 90 = East, 180 = South, 270 = West) relative to magnetic north. |
| Exif.GPSInfo.GPSImgDirectionRef | Direction reference (M = Magnetic North). | M | Specifies whether the direction is relative to magnetic north. |
| Exif.GPSInfo.GPSSpeed | The speed of the device when the image was taken, in kilometers per hour (km/h). | 30.5 | Captured if the device is moving at the time of image capture. |
| Exif.GPSInfo.GPSSpeedRef | Speed unit (K = kilometers per hour). | K | Currently, speed is recorded in kilometers per hour in QField. |
| Exif.GPSInfo.GPSDateStamp | The date the image was captured in UTC. | 2024:10:06 | Date stored in the format YYYY:MM:DD. |
| Exif.GPSInfo.GPSTimeStamp | The time the image was captured in UTC. | 14:23:56 | Time stored in the format HH:MM:SS. |
| Exif.GPSInfo.GPSSatellites | The number of satellites used for GPS information. | 12 | Number of GPS satellites that contributed to location accuracy. |
| Exif.Image.Make | The make of the device that captured the image. | QField | Always set to "QField" to indicate the software used. |
| Xmp.tiff.Make | XMP tag for the device make, also set to QField. | QField | Similar to Exif.Image.Make, used for compatibility in XMP metadata. |
Observații¶
- QField captures and stores EXIF metadata automatically when using the internal (i.e. not the native) camera.
- The coordinates (latitude and longitude) are always stored as absolute values, with the hemisphere indicated by the corresponding reference tags (e.g.,
GPSLatitudeReffor N/S). - Altitude is recorded as a positive or negative value depending on whether the elevation is above or below sea level, with
GPSAltitudeRefused to indicate the direction. - Date and time stamps are stored in UTC format for consistency across locations.
- See the corresponding how to fetch geotag exif information into the attribute table section for instructions how to make use of this