Compute bounding box

[pascal-bourut]

Hi,
I'm trying to calculate the bounding box (top left, bottom right geo coordinates) of the visible map, knowing the center (lat, lng) and the zoom factor (z).
What is the size of the viewport in pixel?
Thank you!

[Chetan11-dev]

see https://github.com/omkarcloud/google-maps-scraper#-how-to-create-polygons-and-search-using-geolocation