Location questions

Location of the user device can be acquired adding a LOCATION question.

The user needs to tap on the "Update Location" button to get the location data stored (see below).

Basically tapping that button gives the app the consent to store the user's location.

It cannot be done automatically for the above reason (privacy issues).

If you ever used Facebook or Instagram, you might have noticed they use the same approach, as when adding a post the location needs to be added separately.

A location question cannot be required: a user might not want to answer that, or the device might lack GPS capabilities (for example a cheap Android tablet).

Moreover, often getting a GPS lock is not possible for a number of reasons. If that happens and the location question was required, the user would not be able to complete the form.

Mobile app

On the mobile app the interface will show:

Data

Format

Latitude and Longitude

Signed degrees format, with 6 decimal places to pinpoint a location within 11cm.

Accuracy

Meters, refers to how close the device's calculated position is from the truth, expressed as a radius. Consumer smartphones devices can get a maximum accuracy of 3 or 4 meters.

The interface and features are kept to a minimum to be able to work both online and offline.

Web Application

When adding or editing data via the web application (See how), more features are available since the application will always be online.

You could:

  • Enter the coordinates manually.

  • Find a location based on an address (it is called geocoding).

  • Find your current location and drag the marker where you want.

  • Change map tiles to your preferences.

Latitude and longitude values are shown as signed degrees format, with 6 decimal places to pinpoint a location within 11cm.

Exported location data

When exporting your datasets, by downloading a csv or json file and by using the API endpoints, location data are provided in both signed degrees format and UTM.

‚Äč

Reverse geocoding

Epicollect5 does not feature any way to automatically pick up an address based on latitude and longitude. Such a feature would require a reverse geocoding service (usually not free) and an internet connection thus it would not work offline.

For projects requiring it, latitude and longitude values can be converted to addresses in the post-processing of the data by using a third-party service like What3Words or Geocodio.