How to force technician to capture geolocation on activity start and/or end ?

Summary:

How to make sure the technician captures his/her geolocation when starting or ending an activity ?

Content (required):

Customer wants to ensure that the technician captures his/her geolocation when starting or ending an activity, in order to audit afterwards if the technicians are performing these actions at the right location.

Version (include the version you are using, if applicable):

22.B

Code Snippet (add any code snippets that support your topic, if applicable):

N/A