Hi there, @Phil 
Thank you so much for pointing us in this direction!
As for the adding locations by longitude/altitude, we already have such a request. You can upvote it here 
- Add locations by pindrop or altitude/longitude
Hi there, @Phil
Thank you so much for pointing us in this direction!
As for the adding locations by longitude/altitude, we already have such a request. You can upvote it here - Add locations by pindrop or altitude/longitude