Created
June 21, 2016 20:04
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createMapCircle: function(latitude, longitude){ | |
var latitudeRadius = this.getRadiusInLatitudeDegrees(this.radius); | |
var longuitudeRadius = this.getRadiusInLongitudeDegrees(this.radius, latitude); | |
for (var i = 0; i < 360; i++) { | |
var angle = i * (3.141516/180); | |
this.push('points', { | |
latitude: latitude + latitudeRadius * Math.sin(angle), | |
longitude: longitude + longuitudeRadius * Math.cos(angle), | |
}); | |
} | |
}, | |
getRadiusInLatitudeDegrees: function(radiusMeters) { | |
var metersPerLatitudeDegree = 110574; | |
return radiusMeters / metersPerLatitudeDegree; | |
}, | |
getRadiusInLongitudeDegrees(radiusMeters, circleCenterLatitude) { | |
var metersPerLongitudeDegree = 111320 * Math.cos(circleCenterLatitude); | |
return radiusMeters / metersPerLongitudeDegree; | |
} |
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