QField allows you to create points, lines, and polygons from tracking your position.
To activate tracking, you must first make sure the positioning is active. Then, open the side dashboard, long-press on a legend layer within which you want to save your tracks to, and select the Setup tracking button to configure the tracking session.
Two constraints are available to limit the number of vertices recorded during tracking: - A minimum time interval - A minimum distance
Once you have finished configuring your tracking session, hit the Start tracking button to begin recording. At this stage, a feature form will appear, which allows you to define the attributes of the feature(s) that will be created while QField tracks your position.
For line and polygon layers, a single feature - its geometry formed of vertices from the recorded positions - will be create per tracking session. For point layers, a feature will be created for each recorded position, with attribute values entered in the form remembered across features.
QField will skip the feature form step if the layer is configured to hide all attributes or if form has been set to hide on feature addition in the attribute form settings. This can streamline the process of starting tracking sessions.
To prevent overlapping, you have the option to set a maximum distance tolerance between the last and next tracked point/vertices. This ensures that if the position exceeds this defined distance, it is considered as an erroneous entry.
Once a tracking session has been setup, a badge will appear in the side dashboard legend next to the layer(s) against which tracking is being recorded.
The features created by the tracking session are saved on every vertex recorded. A rubberband line overlayed onto the map is attached to each tracking session, allowing you to glance at what has been recorded.
If the layer linked to a tracking session supports the M dimension, QField will store the time passed since the first vertex recorded in each vertex's M value.
You can simultanously record multiple trackings sessions across several layers.
While the tracking session is active the layer is still editable, but the tracked feature can't be edited or deleted until the tracking session is stopped over the legend again.
To terminate tracking, simply open the side dashboard. From there, long-press on a legend layer linked to an active tracking session and select the Stop tracking button.