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@vulkd
Created Jan 3, 2020
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article polar-projections-with-mapbox
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8'/>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no'/>
<script src='https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.6.0/proj4.js' integrity='sha256-GfiEM8Xh30rkF6VgCIKZXLhoPT8hWwijiHkiKeJY82Y=' crossorigin='anonymous'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/mapbox-gl/1.4.0/mapbox-gl.js' integrity='sha256-4vgPjIfsjmay+xrYNgX79wO5pIHcSKoCWJKwNmoqcms=' crossorigin='anonymous'></script>
<link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/mapbox-gl/1.4.0/mapbox-gl.css' integrity='sha256-t2fYcalxXkJ++B2YwGcM5KYrF8Fu9vCcO69LI16Q5Y0=' crossorigin='anonymous'/>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; height: 100%; };
</style>
</head>
<body>
<div id='map'></div>
<script>
proj4.defs('EPSG:3031', '+proj=stere +lat_0=-90 +lat_ts=-71 +lon_0=0 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs');
function reprojectCoord(coord, crs) {
const reprojected = proj4(crs, coord);
const reprojectedForMapbox = proj4('EPSG:3857', 'EPSG:4326', reprojected);
return reprojectedForMapbox;
};
mapboxgl.accessToken = 'your_access_token';
const map = new mapboxgl.Map({
container: 'map',
style: 'your_style_url',
center: [0, 0],
bearing: 140,
zoom: 3,
minZoom: 3,
maxZoom: 12,
renderWorldCopies: false,
maxBounds: [[-180, -80], [180, 80]]
});
map.addControl(new mapboxgl.NavigationControl());
map.on('load', () => {
map.addLayer({
'id': 'comnap-facilities',
'type': 'circle',
'source': {
'type': 'geojson',
'data': {'type':'FeatureCollection','name':'test2','crs':{'type':'name','properties':{'name':'urn:ogc:def:crs:OGC:1.3:CRS84'}},'features':[{'type':'Feature','properties':{'fac_id':4,'name_eng':'Belgrano II','name_off':'Base Antártica Belgrano II','operator_1':'Argentina','operator_2':null,'fac_type':'Station','fac_seas':'Year-Round','fac_stat':'Open','year_est':1979,'ant_reg':'East Antarctica','lat_dd':-77.873889,'lon_dd':-34.627778,'lat_ddm':'77° 52.4333' S','lon_ddm':'34° 37.6667' W','elev_m':'256.5','elev_datum':'MSL','peak_pop':0,'photo_url':'https://pgc.quickbase.com/up/bibrbwkpg/a/r4/e56/v0/Base_Belgrano.jpg','webcam_url':null,'date_mod':'2018/07/30'},'geometry':{'type':'Point','coordinates':[-6.749688686482691,9.727025422232318]}},{'type':'Feature','properties':{'fac_id':5,'name_eng':'Brown','name_off':'Base Antártica Almirante Brown','operator_1':'Argentina','operator_2':null,'fac_type':'Station','fac_seas':'Seasonal','fac_stat':'Open','year_est':1951,'ant_reg':'Antarctic 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W','elev_m':'25','elev_datum':'MSL','peak_pop':90,'photo_url':'https://pgc.quickbase.com/up/bibrbwkpg/a/r8/e56/v0/antartida_base_esperanza_12.jpg','webcam_url':null,'date_mod':'2018/03/26'},'geometry':{'type':'Point','coordinates':[-22.160197130709726,14.24306799160599]}},{'type':'Feature','properties':{'fac_id':10,'name_eng':'Marambio','name_off':'Base Antártica Marambio','operator_1':'Argentina','operator_2':null,'fac_type':'Station','fac_seas':'Year-Round','fac_stat':'Open','year_est':1969,'ant_reg':'Antarctic Peninsula','lat_dd':-64.241769,'lon_dd':-56.623225,'lat_ddm':'64° 14.5061' S','lon_ddm':'56° 37.3935' W','elev_m':'209.5','elev_datum':'MSL','peak_pop':165,'photo_url':'https://pgc.quickbase.com/up/bibrbwkpg/a/r10/e56/v0/BASE-MARAMBIO-H%C3%89RCULES-C-130-Copy.jpg','webcam_url':null,'date_mod':'2018/07/30'},'geometry':{'type':'Point','coordinates':[-21.341213402132478,13.920520105084462]}},{'type':'Feature','properties':{'fac_id':11,'name_eng':'Matienzo','name_off':'Base Antártica Matienzo','operator_1':'Argentina','operator_2':null,'fac_type':'Station','fac_seas':'Seasonal','fac_stat':'Open','year_est':1961,'ant_reg':'Antarctic Peninsula','lat_dd':-64.975865,'lon_dd':-60.070948,'lat_ddm':'64° 58.5519' S','lon_ddm':'60° 4.2569' W','elev_m':'32','elev_datum':'MSL','peak_pop':12,'photo_url':'https://pgc.quickbase.com/up/bibrbwkpg/a/r11/e56/v0/matienzooverflight.jpg','webcam_url':null,'date_mod':'2018/03/26'},'geometry':{'type':'Point','coordinates':[-21.496854407178208,12.280623755956825]}},{'type':'Feature','properties':{'fac_id':12,'name_eng':'Melchior','name_off':'Base Antártica Melchior','operator_1':'Argentina','operator_2':null,'fac_type':'Station','fac_seas':'Seasonal','fac_stat':'Open','year_est':1947,'ant_reg':'Antarctic Peninsula','lat_dd':-64.325705,'lon_dd':-62.976329,'lat_ddm':'64° 19.5423' S','lon_ddm':'62° 58.5797' 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