Usa allegato

In QField, un campo con il widget Allegato può essere usato per:

• Show and take photos
• Show and record videos
• Listen and record sound clips
• Show links to external files like PDFs or documents

To configure the Widget, please refer to the Attributes Form Documentation

Aggiungi una serie di immagini a un elemento

Preparazione da Desktop

It is also possible to add more pictures to the feature either by having several attachment field attributes or by creating a relation to a separate table where the image paths are shown. In this section we will show you an example how this is done. A relation to a second layer needs to be set in the QGIS properties so that when adding images or other formats, these are stored in the related table.

Workflow

1. Create two two tables following the style as shown below. One table where the features are stored and one with a list of pictures.

   Apiary:

   Field	Type
   id	Text (UUID)
   geometry	Geometry
   ...

   Apiary_pictures:

   Field	Type
   id	Text (UUID)
   apiary_id	Text (UUID)
   path	Text
   ...

Relazioni

Crea una relazione con:

• apiary Layer di riferimento
• id Campo di riferimento
• apiary_picture Layer che fa riferimento
• apiary_id Campo che fa riferimento
• strength Composizione

Attribute Form configuration

Once you have created the relation the relation can be properly configured in the feature layer's attribute forms. In the apiary layer we have to specify a default value to create a unique id. For the apiary_picture layer, you will have to change the widget type to Attachment

Workflow

Apiary

1. Direct to Properties > Attribute Form
2. For the uuid field choose between the Text Edit or UUID Generator widget.
3. Set the default value to uuid('WithoutBraces').
4. Hide it from the view as it should not be edited by the user.

Imposta il widget della relazione su relazione uno a molti e aggiungi la relazione al modulo

**Apiary_picture**

1. Direct to *Properties* > *Attribute Form*
2. Set the widget type of the field `path` to *Attachment*
3. Add it to the form layout.

Drawing and sketching

QField has an in-app drawing and sketching functionality enabling you to directly sketch over and annotate images captured while in the field as well as drawing on top of a blank canvas or over a template.

Drawing templates

On top of annotating captured images, QField supports drawing from image templates. The following two methods are available to add templates:

• The first method is to create a drawing_templates folder located alongside a project file and populate it with images. Whenever that project is loaded, QField will register all images within that folder as drawing templates.
• Alternatively, you can add images into the drawing_templates folder found inside your QField app folder. If you are not familiar with that app folder, its location is shown at the bottom of the About QField overlay.

Templates shipped alongside projects as well as the QField app folder will be shown when users choose "Draw a sketch" by pressing the (⋮) menu icon of the attachment widget.

Geotagging

Lavoro sul campo

QField's internal; camera will automatically geotag your pictures.

Information about location and direction of the pictures will therefore be baked into the image file.

Note

While with older Android versions it was possible to use other apps like the amazing OpenCamera app for taking pictures and preserving EXIF information from there, this is no longer with recent Android versions. Is recommended to disable Use native Camera in the settings to preserve EXIF information.

Image Stamping

QField allows you to add image stamping. This is configured directly from the QFieldSync plugin in QGIS. With this functionality you can add detailed and formatted information when taking photos in the field.

Styling Settings

Preparazione da Desktop

Navigate to the Project > Properties > QField > Attachments and Directories sub-panel and click on "Settings" for "Customize image stamping details".

You can add the following settings:

• Font and Alignment: You have full control over the appearance of the stamped text, including the font style (color, size, drop shadow) and horizontal alignment (left, center, or right).

• Image Decoration: Add a custom image overlay, such as a logo or a watermark, on top of the captured image.

• Force Stamping: This option enforces image stamping, ensuring that all images collected for the project have the required information overlaid, regardless of the individual QField app settings.

• Stamp Details: Craft a multiline string using QGIS expressions to define the information stamped on the image. A default template is provided to get you started, which includes common variables like date, time, and GNSS information.

Default Template:

[% format_date(now(), 'yyyy-MM-dd @ HH:mm') %]
Latitude [% coalesce(format_number(y(@gnss_coordinate), 7), 'N/A') %] | Longitude [% coalesce(format_number(x(@gnss_coordinate), 7), 'N/A') %] | Altitude [% coalesce(format_number(z(@gnss_coordinate), 3) || ' m', 'N/A') %]
Speed [% if(@gnss_ground_speed != 'nan', format_number(@gnss_ground_speed, 3) || ' m/s', 'N/A') %] | Orientation [% if(@gnss_orientation != 'nan', format_number(@gnss_orientation, 1) || ' °', 'N/A') %]

Example

Recupero dei Geotag (EXIF) dal file immagine nella tabella degli attributi

Preparazione da Desktop

Sometimes you might be interested in automatically storing Geotags such as the latitude, longitude, orientation, etc. This information is also known as EXIF tags.

Per memorizzare le informazioni EXIF, attenersi alla seguente procedura:

1. Aggiungi un attributo per ogni tag EXIF nella tabella che contiene le immagini.
2. Nel modulo immagini, configurare il valore predefinito di ogni attributo per il corrispondente EXIF expression See QGIS EXIF function, e assicurati che Applica all'aggiornamento sia attivato.
3. I tag EXIF che QField può catturare sono elencati nella documentazione di QGIS (link sopra). However, this list might slightly vary depending on the mobile characteristics.
4. Capturing EXIF tags requires accessing the full physical path of the picture. Be sure to reflect this in the QGIS expression. Ad esempio, l'espressione exif(@project_folder + '/' + "path", 'Exif.Image.Orientation') recupera l'orientamento dell'immagine memorizzata in path. For more tags visit the QField EXIF reference documentation and the exiv library documentation.
5. Completed! QField now captures and stores the EXIF tags in the pictures table while taking pictures.

Dimensione massima dell'immagine

Preparazione da Desktop

The advanced settings allow rescaling the photos to a maximum width/height in Project > Properties > Attachments and Directories

Percorso dell'allegato configurabile

Preparazione da Desktop

QFieldSync provides the possibility to configure the path and the file names of picture attachments.

1. Go to Vector Layer Properties > QField
2. Scegli il layer, il campo e configura l'espressione

Use expressions to specify the path of the attachments. By default, pictures are saved into the "DCIM" folder, audio are saved into the "audio" folder and videos are saved into "video" with a timestamp as name.

picture path

Additional directories can be synchronized with pictures or other attachments. Extra paths can be configured in Attachment and Directories tab in the QFieldSync settings under Project > Properties > QField. All paths are relative to the project directory.

attachments directories