QField is equipped with a nifty search bar which allows you to search for features within project's vector layers, to go to entered coordinates and more.
Tap on the Search button in the top-right corner of the screen to open expand the search bar.
Vector layers search¶
The value entered in the search bar will be used to find features with matching attribute values. A minimum of three characters is required to start the search.
Additionally, you have the option to employ the code scan functionality for this purpose.
When click on the "Scan code" will trigger QField's code reader, initiating the scanning process to decode the code.
Once you are content with the scanned information, you can simply click on the checkmark (✔️) OK button to initiate a search for that specific string(In this example, the code corresponds to a user identifier that is associated with various features in a project dataset).
For distinct outcomes, is recommend encoding your feature UUIDs. This will allow us to promptly locate the relevant items.
Matching features will show in the results list offering you two possible actions :
- Tap on the name in the result to pan the map on the feature (the feature will be highlighted in yellow).
- Tap on the attributes button to open its attributes.
Go to coordinate¶
It is possible to go to a given coordinates through the search bar by entering latitude, longitude coordinates (in WGS84). You will also be able to enter coordinates in the CRS of the opened project.
Once QField identifies the entered value as a coordinate, tap on the coordinates in the result to move the map canvas to that point.
Go to spatial bookmark¶
The search bar also matches saved spatial bookmarks. The entered text will be matched against user-saved bookmarks as well as embedded bookmarks with the currently opened project.
The matching bookmarks will appear in the results list. Tapping on one bookmark will re-center the map canvas to match the bookmark's extent.
QField's search bar also acts as a nifty calculator, whereas entered text can be treated as expressions, with their returned value shown in the result list with the possibility of copying the value to the clipboard.
To trigger the calculator, a = * (i.e. equal sign followed by a space) prefix is needed. For example, = 20 + 5* would return a value of 25.
Pro-tip: use the aggregate() expression function to calculate statistics against vector layers. For example, calculating the total area covered by a polygon layers can be done by typing = aggregate('my_layer','sum', $area).
Configure vector layers search in QGIS¶
Vorbereitung am Schreibtisch
By default, all vector layers are searchable. When configuring your project in QGIS, it is possible to exclude vector layers from search results. To do so, open the project properties dialog and switch to the Data Sources panel, where you will be presented with a layers capabilities table widget. From there, use the Searchable checkbox to include/exclude specific layers.