Line of sight
I would like to have an ground level profile incl. the showed direct line between an selected POI (or an free taped point within a map) and the map center like this:
This should be calculated on the fly - when I move the map.
With that, I could check for example what hill top I can see from a position.
And if I could set an individual additional offset on ground level on both ends, then I could correct wrong ground level values and (more important) line of sight between a television tower and an other higher buildings or towers.