74 lines
1.7 KiB
JavaScript
74 lines
1.7 KiB
JavaScript
goog.require('ol.Map');
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goog.require('ol.View');
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goog.require('ol.extent');
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goog.require('ol.format.GeoJSON');
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goog.require('ol.layer.Vector');
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goog.require('ol.source.Vector');
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goog.require('ol.style.Fill');
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goog.require('ol.style.Stroke');
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goog.require('ol.style.Style');
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goog.require('ol.style.Text');
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var map = new ol.Map({
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target: 'map',
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view: new ol.View({
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center: [0, 0],
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zoom: 1
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})
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});
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var labelStyle = new ol.style.Style({
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geometry: function(feature) {
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var geometry = feature.getGeometry();
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if (geometry.getType() == 'MultiPolygon') {
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// Only render label for the widest polygon of a multipolygon
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var polygons = geometry.getPolygons();
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var widest = 0;
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for (var i = 0, ii = polygons.length; i < ii; ++i) {
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var polygon = polygons[i];
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var width = ol.extent.getWidth(polygon.getExtent());
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if (width > widest) {
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widest = width;
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geometry = polygon;
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}
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}
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}
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return geometry;
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},
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text: new ol.style.Text({
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font: '12px Calibri,sans-serif',
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exceedLength: true,
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fill: new ol.style.Fill({
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color: '#000'
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}),
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stroke: new ol.style.Stroke({
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color: '#fff',
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width: 3
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})
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})
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});
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var countryStyle = new ol.style.Style({
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fill: new ol.style.Fill({
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color: 'rgba(255, 255, 255, 0.6)'
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}),
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stroke: new ol.style.Stroke({
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color: '#319FD3',
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width: 1
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})
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});
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var style = [countryStyle, labelStyle];
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var vectorLayer = new ol.layer.Vector({
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source: new ol.source.Vector({
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url: 'data/geojson/countries.geojson',
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format: new ol.format.GeoJSON()
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}),
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style: function(feature) {
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labelStyle.getText().setText(feature.get('name'));
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return style;
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},
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declutter: true
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});
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map.addLayer(vectorLayer);
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