Hello Nowak ,
Than you for your answer .
Happy New Year !
The subject was described in this post :
The matter is how to include fix obstacles or aeras in Safesky .
In order to warn gliders or light planes of a fix area ( possibly dangerous ) to avoid them or care with !
On the other , protect the users of these areas from collisions …
Flarm network has something like that for main fix obstacles like skilifts or electric aerian lines !
Unfortunately, with the addition of an optional subscription ( not with basic subscription …)
My personnal case is about aircrafts models areas .
In these areas you can find flying small planes from ground to about 200 meters high and , about 100 or 200m around it .
Some are regular and official ones , with notices on aeronautical maps … But only on paper maps or on aerian websites 
( Special case with areas on a hill , so right altitude coud be over 1000 m high …)