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| import Feature from 'ol/Feature.js';
import Map from 'ol/Map.js';
import OSM from 'ol/source/OSM.js';
import Point from 'ol/geom/Point.js';
import TileLayer from 'ol/layer/Tile.js';
import VectorLayer from 'ol/layer/Vector.js';
import VectorSource from 'ol/source/Vector.js';
import View from 'ol/View.js';
import {Fill, RegularShape, Stroke, Style} from 'ol/style.js';
import {fromLonLat} from 'ol/proj.js';
const shaft = new RegularShape({
points: 2,
radius: 5,
stroke: new Stroke({
width: 2,
color: 'black',
}),
rotateWithView: true,
});
const head = new RegularShape({
points: 3,
radius: 5,
fill: new Fill({
color: 'black',
}),
rotateWithView: true,
});
const styles = [new Style({image: shaft}), new Style({image: head})];
const source = new VectorSource({
attributions:
'Weather data by <a href="https://openweathermap.org/current">OpenWeather</a>',
});
const map = new Map({
layers: [
new TileLayer({
source: new OSM(),
}),
new VectorLayer({
source: source,
style: function (feature) {
const wind = feature.get('wind');
const angle = ((wind.deg - 180) * Math.PI) / 180;
const scale = wind.speed / 10;
shaft.setScale([1, scale]);
shaft.setRotation(angle);
head.setDisplacement([
0,
head.getRadius() / 2 + shaft.getRadius() * scale,
]);
head.setRotation(angle);
return styles;
},
}),
],
target: 'map',
view: new View({
center: [0, 0],
zoom: 2,
}),
});
fetch('data/openweather/weather.json')
.then(function (response) {
return response.json();
})
.then(function (data) {
const features = [];
data.list.forEach(function (report) {
const feature = new Feature(
new Point(fromLonLat([report.coord.lon, report.coord.lat]))
);
feature.setProperties(report);
features.push(feature);
});
source.addFeatures(features);
map.getView().fit(source.getExtent());
});
|
)
