Tutorial: Create a field data collection app with Mergin Maps

In this section we're going to use the Mergin Maps app on our mobile device for field data collection.

Make sure you see the project on the screen of your device:

You can see the GPS accuracy. Make sure it's good enough for your purpose.

1. Tap the GPS accuracy value. This will give you the GPS reading.

2. Go back to the project by tapping .

3. Tap the GPS  icon to zoom in on your location.

4. Use two fingers to zoom in further.

5. Tap the icon and choose Map themes.

6. Try different Map Themes.

Let's take an observation point.

7. Tap Record .

8. The GPS locator changes into a crosshair. You can move the crosshair with your fingers to the location that's representative for your observation. This is particularly useful if you don't have access to a parcel due to fences.

9. If you're okay with the location, tap the layer name and choose Survey.

10. To add the point and fill in the field form, tap .

11. Fill in the form.

12. Tap Save to save the observation. Tap Edit geometry if you still want to move your point.

The point is now put on the map with the style from the project. If you tap it you can also see the preview:

With the  icon you can navigate to the point. With the icon you can edit the point.

Let's now update a crop of a parcel.

13. Tap on a parcel and tap to go to the form.

14. Change the crop type and the year and tap Save.

14. Tap to synchronise your changes with the cloud.

Now we'll go back to QGIS to check our project.