96 lines
2.1 KiB
JavaScript
96 lines
2.1 KiB
JavaScript
goog.require('ol.Map');
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goog.require('ol.View');
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goog.require('ol.format.GeoJSON');
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goog.require('ol.layer.Image');
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goog.require('ol.layer.Tile');
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goog.require('ol.layer.Vector');
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goog.require('ol.source.ImageVector');
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goog.require('ol.source.MapQuest');
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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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var map = new ol.Map({
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layers: [
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new ol.layer.Tile({
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source: new ol.source.MapQuest({layer: 'sat'})
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}),
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new ol.layer.Image({
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source: new ol.source.ImageVector({
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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: 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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})
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})
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],
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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 featureOverlay = new ol.layer.Vector({
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source: new ol.source.Vector(),
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map: map,
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style: new ol.style.Style({
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stroke: new ol.style.Stroke({
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color: '#f00',
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width: 1
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}),
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fill: new ol.style.Fill({
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color: 'rgba(255,0,0,0.1)'
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})
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})
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});
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var highlight;
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var displayFeatureInfo = function(pixel) {
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var feature = map.forEachFeatureAtPixel(pixel, function(feature, layer) {
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return feature;
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});
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var info = document.getElementById('info');
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if (feature) {
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info.innerHTML = feature.getId() + ': ' + feature.get('name');
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} else {
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info.innerHTML = ' ';
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}
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if (feature !== highlight) {
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if (highlight) {
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featureOverlay.getSource().removeFeature(highlight);
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}
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if (feature) {
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featureOverlay.getSource().addFeature(feature);
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}
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highlight = feature;
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}
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};
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map.on('pointermove', function(evt) {
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if (evt.dragging) {
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return;
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}
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var pixel = map.getEventPixel(evt.originalEvent);
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displayFeatureInfo(pixel);
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});
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map.on('click', function(evt) {
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displayFeatureInfo(evt.pixel);
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});
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