Datos EXIF en QField¶
Cuando se use la cámara interna de QField, las imágenes se geoetiquetarán con varios campos de metadatos EXIF. Debajo hay una tabla de referencia con la lista de etiquetas EXIF disponibles, su descripción, ejemplos y comentarios sobre su uso en QField.
| Etiqueta EXIF | Descripción | Ejemplo | Comentarios |
|---|---|---|---|
| Exif.GPSInfo.GPSLatitude | La latitud de la localización donde se tomó la imagen. | 47.3769 | Guardada como un valor positivo con una referencia a N/S (ver abajo). |
| Exif.GPSInfo.GPSLatitudeRef | Referencia de latitud (N = Norte, S = Sur). | N | Determina si la latitud es al Norte o a Sur del Ecuador. |
| Exif.GPSInfo.GPSLongitude | La longitud de la localización donde se tomó la imagen. | 8.5417 | Guardada como un valor positivo con una referencia a E/O (ver abajo). |
| Exif.GPSInfo.GPSLongitudeRef | Referencia de longitud (E = Este, O = Oeste). | E | Determina si la longitud es al Este o a Oeste del meridiano 0. |
| 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. |
Notas¶
- 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