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April 24, 2024 20:14
Fit map to polygon bounds with Turf and Mapbox GL JS
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset='utf-8' /> | |
<title></title> | |
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' /> | |
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.18.0/mapbox-gl.js'></script> | |
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.18.0/mapbox-gl.css' rel='stylesheet' /> | |
<script src='https://api.mapbox.com/mapbox.js/plugins/turf/v2.0.2/turf.min.js'></script> | |
<style> | |
body { margin:0; padding:0; } | |
#map { position:absolute; top:0; bottom:0; width:100%; } | |
#fitBounds { | |
background-color: #ee8a65; | |
font-family: Helvetica, Arial, Sans-Serif; | |
color: #fff; | |
position: absolute; | |
top: 1em; | |
right: 1em; | |
padding: 0.7em; | |
border-radius: 0.2em; | |
cursor: pointer; | |
} | |
</style> | |
</head> | |
<body> | |
<div id='map'></div> | |
<div id='fitBounds' onclick='fit()'>fit to polygon</div> | |
<script> | |
mapboxgl.accessToken = 'pk.eyJ1IjoiZGFuc3dpY2siLCJhIjoiY2l1dTUzcmgxMDJ0djJ0b2VhY2sxNXBiMyJ9.25Qs4HNEkHubd4_Awbd8Og'; | |
var map = new mapboxgl.Map({ | |
container: 'map', // container id | |
style: 'mapbox://styles/mapbox/streets-v8', //stylesheet location | |
center: [-74.50, 40], // starting position | |
zoom: 9 // starting zoom | |
}); | |
var geojson = { | |
"type": "FeatureCollection", | |
"features": [ | |
{ | |
"type": "Feature", | |
"properties": {}, | |
"geometry": { | |
"type": "Polygon", | |
"coordinates": [ | |
[ | |
[ | |
-33.83789062499999, | |
60.37042901631508 | |
], | |
[ | |
-39.814453125, | |
55.825973254619015 | |
], | |
[ | |
-33.662109375, | |
53.90433815627468 | |
], | |
[ | |
-25.839843749999996, | |
55.87531083569679 | |
], | |
[ | |
-21.708984375, | |
59.84481485969105 | |
], | |
[ | |
-29.619140624999996, | |
61.39671887310411 | |
], | |
[ | |
-33.83789062499999, | |
60.37042901631508 | |
] | |
] | |
] | |
} | |
} | |
] | |
}; | |
var bbox = turf.extent(geojson); | |
map.on('load', function(){ | |
map.addSource('my-geojson', { | |
"type": "geojson", | |
"data": geojson | |
}); | |
map.addLayer({ | |
"id": "geojsonLayer", | |
"type": "fill", | |
"source": "my-geojson", | |
"paint": { | |
"fill-color": "#000fff" | |
} | |
}); | |
}); | |
function fit() { | |
map.fitBounds(bbox, {padding: 20}); | |
} | |
</script> | |
</body> | |
</html> |
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Landed here from google and wanted to note that at this point in time
turf.bbox
would be the way to do this in place ofturf.extent