Geographic Point

GeoPoint represents a geographic point for PHP including conversion, point-to-point distance, and bounding-box calculations.

Usage

$statueOfLibertyPoint = new GeoPoint(40.689604, -74.04455, GeoPoint::DEGREES);

Constructor options

• latitude -- Latitude
• longitude -- Longitude
• format -- The format of the passed-in lat/lon as GeoPoint::DEGREES or GeoPoint::RADIANS

Methods

• getLatitude(): Return the point's latitude per the format of the point (GeoPoint::DEGREES or GeoPoint::RADIANS)
• getLongitude(): Return the point's longitude per the format of the point (GeoPoint::DEGREES or GeoPoint::RADIANS)
• distanceTo(GeoPoint, kmOrMiles): Calculate the distance to another GeoPoint instance using either GeoPoint::KILOMETERS or GeoPoint::MILES.
• boundingCoordinates(distance, radius, kmOrMiles): Calculates the bounding coordinates of distance from the point and returns an array with the SW and NE points of the bounding box . If radius is not provided, the radius of the Earth will be used. The distance is calculated in kilometers unless kmOrMiles is set to GeoPoint::MILES.

Static Methods

• GeoPoint::degreesToRadians(value): Converts value in degrees to radians
• GeoPoint::radiansToDegrees(value): Converts value in radians to degrees
• GeoPoint::milesToKilometers(value): Converts value in miles to kilometers
• GeoPoint::kilometersToMiles(value): Converts value in kilometers to miles

Running Tests

php composer.phar test

Credits

Background

This is inspired by David Wood's JavaScript port of the Java code presented in Finding Points Within a Distance of a Latitude/Longitude Using Bounding Coordinates by Jan Philip Matuschek.

Authors/Contributors

• Will Fitch ([email protected])
• Jonah H. Harris ([email protected])

License

The MIT License

Copyright (c) 2016 MeetMe, Inc. http://www.meetmecorp.com/

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