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google-mapsgmsmapview

GMSCameraPosition: convert kilometers to zoom level

There is a way to convert a distance (in kilometers) into a float zoom level of a GMSCameraPosition?

I have an app where the user specifies a diameter (in kilometers) that he wants to see around the gps checkmark (his position). So, I need to convert that distance (like, 30 km) into a zoom level that fits that distance in kilometers.

I'm very new with Google Maps and didn't find a way to that until now.

Thanks in advance.

Solution

  • For calculating with GPS coordinates have a look here. (Especially the section "Destination point given distance and bearing from start point").

    When you have your coordinates you can use the fitBounds-method of the Map-object which does exactly what you want.