97 lines
2.2 KiB
JavaScript
97 lines
2.2 KiB
JavaScript
import Map from '../src/ol/Map.js';
|
|
import View from '../src/ol/View.js';
|
|
import KML from '../src/ol/format/KML.js';
|
|
import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
|
|
import Stamen from '../src/ol/source/Stamen.js';
|
|
import VectorSource from '../src/ol/source/Vector.js';
|
|
import {Circle as CircleStyle, Fill, Stroke, Style} from '../src/ol/style.js';
|
|
|
|
|
|
const styleCache = {};
|
|
const styleFunction = function(feature) {
|
|
// 2012_Earthquakes_Mag5.kml stores the magnitude of each earthquake in a
|
|
// standards-violating <magnitude> tag in each Placemark. We extract it from
|
|
// the Placemark's name instead.
|
|
const name = feature.get('name');
|
|
const magnitude = parseFloat(name.substr(2));
|
|
const radius = 5 + 20 * (magnitude - 5);
|
|
let style = styleCache[radius];
|
|
if (!style) {
|
|
style = new Style({
|
|
image: new CircleStyle({
|
|
radius: radius,
|
|
fill: new Fill({
|
|
color: 'rgba(255, 153, 0, 0.4)'
|
|
}),
|
|
stroke: new Stroke({
|
|
color: 'rgba(255, 204, 0, 0.2)',
|
|
width: 1
|
|
})
|
|
})
|
|
});
|
|
styleCache[radius] = style;
|
|
}
|
|
return style;
|
|
};
|
|
|
|
const vector = new VectorLayer({
|
|
source: new VectorSource({
|
|
url: 'data/kml/2012_Earthquakes_Mag5.kml',
|
|
format: new KML({
|
|
extractStyles: false
|
|
})
|
|
}),
|
|
style: styleFunction
|
|
});
|
|
|
|
const raster = new TileLayer({
|
|
source: new Stamen({
|
|
layer: 'toner'
|
|
})
|
|
});
|
|
|
|
const map = new Map({
|
|
layers: [raster, vector],
|
|
target: 'map',
|
|
view: new View({
|
|
center: [0, 0],
|
|
zoom: 2
|
|
})
|
|
});
|
|
|
|
const info = $('#info');
|
|
info.tooltip({
|
|
animation: false,
|
|
trigger: 'manual'
|
|
});
|
|
|
|
const displayFeatureInfo = function(pixel) {
|
|
info.css({
|
|
left: pixel[0] + 'px',
|
|
top: (pixel[1] - 15) + 'px'
|
|
});
|
|
const feature = map.forEachFeatureAtPixel(pixel, function(feature) {
|
|
return feature;
|
|
});
|
|
if (feature) {
|
|
info.tooltip('hide')
|
|
.attr('data-original-title', feature.get('name'))
|
|
.tooltip('fixTitle')
|
|
.tooltip('show');
|
|
} else {
|
|
info.tooltip('hide');
|
|
}
|
|
};
|
|
|
|
map.on('pointermove', function(evt) {
|
|
if (evt.dragging) {
|
|
info.tooltip('hide');
|
|
return;
|
|
}
|
|
displayFeatureInfo(map.getEventPixel(evt.originalEvent));
|
|
});
|
|
|
|
map.on('click', function(evt) {
|
|
displayFeatureInfo(evt.pixel);
|
|
});
|