area of interest parameter in get_observations(), get_tracks() and more

[JudithDekkers]

this parameter is unused in apps

we do not know if it works

• we can remove the parameter
• or we test it and can use it in the future

nice to have

[Mell-A]

the options for this parameter (drawings):

• box = {south, west, north, east}
• point = {latitude, longitude}
• circle = {radius, point}
• polygon = {point[]}

where radius is in km, and for the polygon the first point = last point, and the mapBounds parameter is basically the box option for the drawings parameter