How to add hotspots dynamically using lat, long values from db/json source in Krpano

Question

I want to add hotspot dynamically in each panorama. I have latitude, longitude and heading of each panorama, I just want to add some markers eg. coffee house with an icon. With Krpano editor I can add a few hotspots but for larger number of panorama it becomes impossible to add hotspot manually. What I have understood so far is, krpano place hotspot based on atv and ath values.
I need some formula that converts latitude, longitude of a POI to atv, ath values for a hotspot.