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noushad-pp/map_bounds_from_center_and_radius.js

Created January 24, 2018 16:39
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calculate the bounds of a map manually given a center and a radius
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map_bounds_from_center_and_radius.js
// formula to find the South west and North East points from lat,lon between x kms in radius.
let center = {
lat: 73.1232145,
lng: 221.1234567
};
let radius = 10;
let lat_change = radius/111;
let lon_change = Math.abs(Math.cos(center.lat *(Math.PI/180)));
let sw_lat = center.lat - lat_change;
let sw_lon = center.lng - lon_change;
let ne_lat = center.lat + lat_change;
let ne_lon = center.lng + lon_change
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