47 lines
1.1 KiB
JavaScript
47 lines
1.1 KiB
JavaScript
goog.require('ol.Map');
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goog.require('ol.RendererHints');
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goog.require('ol.View2D');
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goog.require('ol.extent');
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goog.require('ol.layer.Tile');
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goog.require('ol.proj');
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goog.require('ol.source.OSM');
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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.OSM()
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})
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],
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renderers: ol.RendererHints.createFromQueryData(),
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target: 'map',
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view: new ol.View2D({
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center: [0, 0],
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zoom: 2
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})
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});
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function display(id, value) {
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document.getElementById(id).value = value.toFixed(2);
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}
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function wrapLon(value) {
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var worlds = Math.floor((value + 180) / 360);
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return value - (worlds * 360);
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}
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function onMoveEnd(evt) {
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var map = evt.map;
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var extent = map.getView().calculateExtent(map.getSize());
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var bottomLeft = ol.proj.transform(ol.extent.getBottomLeft(extent),
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'EPSG:3857', 'EPSG:4326');
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var topRight = ol.proj.transform(ol.extent.getTopRight(extent),
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'EPSG:3857', 'EPSG:4326');
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display('left', wrapLon(bottomLeft[0]));
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display('bottom', bottomLeft[1]);
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display('right', wrapLon(topRight[0]));
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display('top', topRight[1]);
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}
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map.on('moveend', onMoveEnd);
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