Created
April 19, 2016 20:21
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OpenLayers 3 + windy.js
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| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <title>windy.js integration example</title> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="X-UA-Compatible" content="chrome=1"> | |
| <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width"> | |
| <link rel="stylesheet" href="http://openlayers.org/en/v3.15.0/css/ol.css" type="text/css"> | |
| <style type="text/css"> | |
| #map { | |
| width: 100%; | |
| height: 100%; | |
| position: relative; | |
| } | |
| div.fill { | |
| width: 100%; | |
| height: 100%; | |
| } | |
| #windyMap { | |
| position: absolute; | |
| z-index: 1; | |
| pointer-events: none; | |
| } | |
| .ol-control { | |
| z-index: 2; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="map" class="map"> | |
| <canvas id="windyMap" class="fill"></canvas> | |
| <div id="olMap" class="fill"></div> | |
| </div> | |
| <script src="http://openlayers.org/en/v3.15.0/build/ol.js" type="text/javascript"></script> | |
| <script src="http://esri.github.io/wind-js/windy.js" type="text/javascript"></script> | |
| <script src="script.js" type="text/javascript"></script> | |
| </body> | |
| </html> |
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| var map = new ol.Map({ | |
| layers: [ | |
| new ol.layer.Tile({ | |
| source: new ol.source.Stamen({ | |
| layer: 'toner' | |
| }) | |
| }) | |
| ], | |
| interactions: ol.interaction.defaults({ | |
| altShiftDragRotate: false, | |
| rotate: false | |
| }), | |
| target: 'olMap', | |
| view: new ol.View({ | |
| center: [0, 0], | |
| zoom: 1 | |
| }) | |
| }); | |
| var windy; | |
| var canvas = document.getElementById('windyMap'); | |
| function refreshWindy() { | |
| if(!windy) { | |
| return; | |
| } | |
| windy.stop(); | |
| var mapSize = map.getSize(); | |
| var extent = map.getView().calculateExtent(mapSize); | |
| extent = ol.proj.transformExtent(extent, 'EPSG:3857', 'EPSG:4326'); | |
| canvas.width = mapSize[0]; | |
| canvas.height = mapSize[1]; | |
| windy.start( | |
| [[0,0], [canvas.width, canvas.height]], | |
| canvas.width, | |
| canvas.height, | |
| [[extent[0], extent[1]],[extent[2], extent[3]]] | |
| ); | |
| } | |
| fetch('http://esri.github.io/wind-js/gfs.json').then(function(response) { | |
| return response.json(); | |
| }).then(function(json) { | |
| windy = new Windy({canvas: canvas, data: json }); | |
| refreshWindy(); | |
| }); | |
| map.on('moveend', refreshWindy); |
Author
When I have added projection: 'EPSG:4326' to script.js while creation of map I was not able to plot the particle flow. Can you please help me with the same.
It has been a while, I am surprised that this snippet still works.
The problem is probably that windy.js uses EPSG:3857 as projection so that the overlay will not match with the map below.
But is there any other way to use it for EPSG:4326 as in my application I am using EPSG:4326 and I want to plot this in that projection only.
Look at the source... @cambecc/earth repository. In the libs/earth directory is the source for the original windy code. It includes something about projections.... don't really remember what.
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When I have added projection: 'EPSG:4326' to script.js while creation of map I was not able to plot the particle flow. Can you please help me with the same.