chillerlan/php-geojson-helpers

Documentation

Requirements

• PHP 7.4+
  • ext-json

Installation

requires composer

composer.json (note: replace dev-master with a version boundary)

{
	"require": {
		"php": "^7.4 || ^8.0",
		"chillerlan/php-geojson-helpers": "dev-master"
	}
}

Profit!

Usage

FeatureCollection

$featureCollection = (new FeatureCollection)->setBbox([0, 0, 1024, 1024]);

// add a single feature
$feature = new Feature([512, 512], 'Point', 1);
$featureCollection->addFeature($feature);

// add an iterable of features
$featureCollection->addFeatures([$feature, /* ... more features ... */]);

// create the GeoJSON, feed leaflet
$json = $featureCollection->toJSON();

// as of v2.x via JsonSerializable
$json = json_encode($featureCollection);

{
    "type":"FeatureCollection",
    "bbox":[0, 0, 1024, 1024],
    "features":[
        {
            "type":"Feature",
            "geometry":{
                "type":"Point",
                "coordinates":[512, 512]
            },
            "properties":{
                "id":1
            }
        }
    ]
}

PolylineSimplifyer

$polylineCoords = [[11, 12], [21, 22], [31, 32], /* ... */];

$ps             = new PolylineSimplifyer($polylineCoords);
$simplified     = $ps->simplify(5, true);

API

Feature methods

method	return	description
__construct(array $coords = null, string $type = null, $id = null)	-	coords: [x, y]
setGeometry(array $coords, string $type)	Feature	coords: [x, y], type is one of Feature::types
setProperties(array $properties)	Feature
setID($id)	Feature

FeatureCollection methods

method	return	description
__construct(iterable $features = null)	-
addFeature(Feature $feature)	FeatureCollection
addFeatures(iterable $features)	FeatureCollection
clearFeatures()	FeatureCollection

common methods to Feature and FeatureCollection

method	return	description
setBbox(array $bbox)	Feature/FeatureCollection
toArray()	array
toJSON(int $options = null)	string
jsonSerialize()	array	from JsonSerializable

ContinentRect

method	return	description
__construct(array $continent_rect)	-	NW/SE corners [[nw_x, nw_y],[se_x, se_y]]
getBounds()	array
getCenter()	array
getPoly()	array

PolylineSimplifyer

method	return	description
__construct(array $polylineCoords)	-	an array of polyline coordiantes: [[x1, y1], [x2, y2], ...]
simplify(float $tolerance = 1, bool $highestQuality = false)	array