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I have used google maps for displaying some locations using markers, based on the user's current location. User's current location is the center point of the map. The default zoom level is 12. In default, I displayed markers within 300 miles(In my case) distance only.

In that how can I do the following,

1) If decrease the zoom level, I need to increase the distance that should display markers within the increased distance also. how much distance should I increase in miles (For e.g. Zoom level is 11) ?

2) If increase the zoom level, I need to decrease the distance that should display markers without the increased distance. how much distance should I decrease in miles (For e.g. Zoom level is 13) ?

Please suggest me there is any built-in option to do that ...

marked as duplicate by PolyGeo Mar 29 '17 at 8:24

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Check out this question, it has answers with equations and explanations for the different zoom levels. What ratio scales do Google Maps zoom levels correspond to?

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