How can I visualise requests on choropleth map if I have only location data in logs?
Welcome to our community! 
Is the location correctly mapped as a geopoint?
Just tuple of lat and lng: [locations:(51.502310550345536;-0.1429114591996011)]
The question is : what is the mapping for this field?
This blog post shows how to use an enrich processor with location data to create choropleth maps.