alexpechkarev / geometry-library
PHP Geometry library provides utility functions for the computation of geometric data on the surface of the Earth.
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README
PHP Geometry Library provides utility functions for the computation of geometric data on the surface of the Earth. Code ported from Google Maps Android API.
Features
- Spherical contains spherical geometry utilities allowing you to compute angles, distances and areas from latitudes and longitudes.
- Poly utility functions for computations involving polygons and polylines.
- Encoding utilities for polyline encoding and decoding.
Dependency
Installation
Issue following command:
composer require alexpechkarev/geometry-library:1.0.5
Alternatively edit composer.json by adding following line and run composer update
"require": { ...., "alexpechkarev/geometry-library":"1.0.5", },
Usage
Here is an example of using GeometryLibrary:
$response = \GeometryLibrary\SphericalUtil::computeHeading( ['lat' => 25.775, 'lng' => -80.190], // from array [lat, lng] ['lat' => 21.774, 'lng' => -80.190]); // to array [lat, lng] echo $response; // -180 $response = \GeometryLibrary\SphericalUtil::computeDistanceBetween( ['lat' => 25.775, 'lng' => -80.190], //from array [lat, lng] ['lat' => 21.774, 'lng' => -80.190]); // to array [lat, lng] echo $response; // 444891.52998049 $response = \GeometryLibrary\PolyUtil::isLocationOnEdge( ['lat' => 25.774, 'lng' => -80.190], // point array [lat, lng] [ // poligon arrays of [lat, lng] ['lat' => 25.774, 'lng' => -80.190], ['lat' => 18.466, 'lng' => -66.118], ['lat' => 32.321, 'lng' => -64.757] ]) ; echo $response; // true $response = \GeometryLibrary\PolyUtil::isLocationOnPath( ['lat' => 25.771, 'lng' => -80.190], // point array [lat, lng] [ // poligon arrays of [lat, lng] ['lat' => 25.774, 'lng' => -80.190], ['lat' => 18.466, 'lng' => -66.118], ['lat' => 32.321, 'lng' => -64.757] ]); echo $response; // false $response = \GeometryLibrary\PolyUtil::containsLocation( ['lat' => 23.886, 'lng' => -65.269], // point array [lat, lng] [ // poligon arrays of [lat, lng] ['lat' => 25.774, 'lng' => -80.190], ['lat' => 18.466, 'lng' => -66.118], ['lat' => 32.321, 'lng' => -64.757] ]); echo $response; // false $response = \GeometryLibrary\PolyUtil::distanceToLine( ['lat' => 61.387002, 'lng' => 23.890636], // point array [lat, lng] ['lat' => 61.487002, 'lng' => 23.790636], // line startpoint array [lat, lng] ['lat' => 60.48047, 'lng' => 22.052754] // line endpoint array [lat, lng] ); echo $response; // 12325.124046196 in meters $response = \GeometryLibrary\PolyUtil::encode( [ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453] ]); echo $response; // '_p~iF~ps|U_ulLnnqC_mqNvxq`@' $response = \GeometryLibrary\PolyUtil::decode('_p~iF~ps|U_ulLnnqC_mqNvxq`@'); echo $response; /** array (size=3) 0 => array (size=2) 'lat' => float 38.5 'lng' => float -120.2 1 => array (size=2) 'lat' => float 40.7 'lng' => float -120.95 2 => array (size=2) 'lat' => float 43.252 'lng' => float -126.453 */
Available methods
PolyUtil class
containsLocation($point, $polygon, $geodesic = false)isLocationOnEdge($point, $polygon, $tolerance = self::DEFAULT_TOLERANCE, $geodesic = true)isLocationOnPath($point, $polyline, $tolerance = self::DEFAULT_TOLERANCE, $geodesic = true)distanceToLine($p, $start, $end)decode($encodedPath)encode($path)
SphericalUtil class
computeHeading($from, $to)computeOffset($from, $distance, $heading)computeOffsetOrigin($to, $distance, $heading)interpolate($from, $to, $fraction)computeDistanceBetween( $from, $to)computeLength($path)computeArea($path)computeSignedArea($path)
containsLocation( $point, $polygon, $geodesic = false ) - To find whether a given point falls within a polygon
$point- ['lat' => 38.5, 'lng' => -120.2 ]$polygon- [ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453]]$geodesic- boolean
Returns boolean
$response = \GeometryLibrary\PolyUtil::containsLocation( ['lat' => 23.886, 'lng' => -65.269], // point array [lat, lng] [ // poligon arrays of [lat, lng] ['lat' => 25.774, 'lng' => -80.190], ['lat' => 18.466, 'lng' => -66.118], ['lat' => 32.321, 'lng' => -64.757] ]); echo $response; // false
isLocationOnEdge( $point, $polygon, $tolerance = self::DEFAULT_TOLERANCE, $geodesic = true ) - To determine whether a point falls on or near a polyline, or on or near the edge of a polygon, within a specified tolerance in meters.
$point- ['lat' => 25.774, 'lng' => -80.190 ]$polygon- [ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453]]$tolerance- tolerance value in degrees$geodesic- boolean
Returns boolean
$response = \GeometryLibrary\PolyUtil::isLocationOnEdge( ['lat' => 25.774, 'lng' => -80.190], // point array [lat, lng] [ // poligon arrays of [lat, lng] ['lat' => 25.774, 'lng' => -80.190], ['lat' => 18.466, 'lng' => -66.118], ['lat' => 32.321, 'lng' => -64.757] ]) ; echo $response; // true
isLocationOnPath( $point, $polygon, $tolerance = self::DEFAULT_TOLERANCE, $geodesic = true ) - To determine whether a point falls on or near a polyline, within a specified tolerance in meters
$point- ['lat' => 25.774, 'lng' => -80.190 ]$polygon- [ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453]]$tolerance- tolerance value in degrees$geodesic- boolean
Returns boolean
$response = \GeometryLibrary\PolyUtil::isLocationOnPath( ['lat' => 25.774, 'lng' => -80.190], // point array [lat, lng] [ // poligon arrays of [lat, lng] ['lat' => 25.774, 'lng' => -80.190], ['lat' => 18.466, 'lng' => -66.118], ['lat' => 32.321, 'lng' => -64.757] ]) ; echo $response; // true
distanceToLine( $p, $start, $end ) - To calculate distance from a point to line start->end on sphere.
$p- ['lat' => 61.387002, 'lng' => 23.890636]$start- ['lat' => 61.487002, 'lng' => 23.790636]$end- ['lat' => 60.48047, 'lng' => 22.052754]
Returns distance from a point to line
$response = \GeometryLibrary\PolyUtil::distanceToLine( ['lat' => 61.387002, 'lng' => 23.890636], // point array [lat, lng] ['lat' => 61.487002, 'lng' => 23.790636], // line startpoint array [lat, lng] ['lat' => 60.48047, 'lng' => 22.052754] // line endpoint array [lat, lng] ); echo $response; // 12325.124046196 in meters
decode( $encodedPath ) - Decodes an encoded path string into a sequence of LatLngs.
$encodedPath- string '_piFps|U_ulLnnqC_mqNvxq`@'
Returns array
$response = \GeometryLibrary\PolyUtil::decode('_p~iF~ps|U_ulLnnqC_mqNvxq`@'); echo $response; /** array (size=3) 0 => array (size=2) 'lat' => float 38.5 'lng' => float -120.2 1 => array (size=2) 'lat' => float 40.7 'lng' => float -120.95 2 => array (size=2) 'lat' => float 43.252 'lng' => float -126.453 */
encode( $path ) - Encodes a sequence of LatLngs into an encoded path string.
$path- [ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453] ]
Returns string
$response = \GeometryLibrary\PolyUtil::encode( [ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453] ]); echo $response; // '_p~iF~ps|U_ulLnnqC_mqNvxq`@'
computeHeading( $from, $to ) - Returns the heading from one LatLng to another LatLng.
$from- ['lat' => 38.5, 'lng' => -120.2]$to- ['lat' => 40.7, 'lng' => -120.95]
Returns int
$response = \GeometryLibrary\SphericalUtil::computeHeading( ['lat' => 25.775, 'lng' => -80.190], ['lat' => 21.774, 'lng' => -80.190])); echo $response; // -180
computeOffset( $from, $distance, $heading ) - Returns the LatLng resulting from moving a distance from an origin in the specified heading.
$from- ['lat' => 38.5, 'lng' => -120.2]$distance- number, the distance to travel$heading- number, the heading in degrees clockwise from north
Returns array
$response = \GeometryLibrary\SphericalUtil::computeOffset(['lat' => 25.775, 'lng' => -80.190], 152, 120); echo $response; /** array (size=2) 'lat' => float 25.774316510639 'lng' => float -80.188685385944 */
computeOffsetOrigin( $from, $distance, $heading ) - Returns the location of origin when provided with a LatLng destination, meters travelled and original heading. Headings are expressed in degrees clockwise from North.
$from- ['lat' => 38.5, 'lng' => -120.2]$distance- number, the distance to travel$heading- number, the heading in degrees clockwise from north
Returns array
$response = \GeometryLibrary\SphericalUtil::computeOffsetOrigin(['lat' => 25.775, 'lng' => -80.190], 152, 120); echo $response; /** array (size=2) 'lat' => float 14.33435503928 'lng' => float -263248.24242931 */
interpolate( $from, $to, $fraction ) - Returns the LatLng which lies the given fraction of the way between the origin LatLng and the destination LatLng.
$from- ['lat' => 38.5, 'lng' => -120.2]$to- ['lat' => 38.5, 'lng' => -120.2]$fraction- number, a fraction of the distance to travel
Returns array
$response = \GeometryLibrary\SphericalUtil::interpolate(['lat' => 25.775, 'lng' => -80.190], ['lat' => 26.215, 'lng' => -81.218], 2); echo $response; /** array (size=2) 'lat' => float 26.647635362403 'lng' => float -82.253737943391 */
computeDistanceBetween( $from, $to ) - Returns the distance, in meters, between two LatLngs. You can optionally specify a custom radius. The radius defaults to the radius of the Earth.
$from- ['lat' => 38.5, 'lng' => -120.2]$to- ['lat' => 38.5, 'lng' => -120.2]
Returns float
$response = \GeometryLibrary\SphericalUtil::computeDistanceBetween(['lat' => 25.775, 'lng' => -80.190], ['lat' => 26.215, 'lng' => -81.218]); echo $response; //float 113797.92421349
computeLength( $path ) - Returns the length of the given path, in meters, on Earth.
$path- [ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453] ]
Returns float
$response = \GeometryLibrary\SphericalUtil::computeLength([ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453] ]); echo $response; //float 788906.98459431
computeArea( $path ) - Returns the area of a closed path.
$path- [ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453] ]
Returns float
$response = \GeometryLibrary\SphericalUtil::computeArea([ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453] ]); echo $response; //float 44766785529.143
computeSignedArea( $path ) - Returns the signed area of a closed path.
$path- [ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453] ]
Returns float
$response = \GeometryLibrary\SphericalUtil::computeSignedArea([ ['lat' => 38.5, 'lng' => -120.2], ['lat' => 40.7, 'lng' => -120.95], ['lat' => 43.252, 'lng' => -126.453] ]); echo $response; //float 44766785529.143
Support
Please open an issue on GitHub
License
Geometry Library Google Maps API V3 is released under the MIT License. See the bundled LICENSE file for details.