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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| // 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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