136 lines
3.4 KiB
JavaScript
136 lines
3.4 KiB
JavaScript
goog.require('ol.Attribution');
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goog.require('ol.Map');
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goog.require('ol.RendererHint');
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goog.require('ol.View2D');
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goog.require('ol.control');
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goog.require('ol.control.ScaleLine');
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goog.require('ol.control.ScaleLineUnits');
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goog.require('ol.geom.LineString');
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goog.require('ol.geom.Point');
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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.proj');
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goog.require('ol.shape');
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goog.require('ol.source.GeoJSON');
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goog.require('ol.source.TileWMS');
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goog.require('ol.style.Stroke');
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goog.require('ol.style.Style');
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var projection = ol.proj.configureProj4jsProjection({
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code: 'EPSG:21781',
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extent: [485869.5728, 76443.1884, 837076.5648, 299941.7864]
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});
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var vectorSource = new ol.source.GeoJSON({
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defaultProjection: projection,
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url: 'data/mtbland.geojson'
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});
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var styleArray = [new ol.style.Style({
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stroke: new ol.style.Stroke({
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color: 'rgba(128,0,128,0.8)',
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lineCap: 'round',
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lineJoin: 'round',
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width: 3
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})
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})];
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var extent = [420000, 30000, 900000, 350000];
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var layers = [
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new ol.layer.Tile({
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source: new ol.source.TileWMS({
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url: 'http://wms.geo.admin.ch/',
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crossOrigin: 'anonymous',
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attributions: [new ol.Attribution({
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html: '© ' +
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'<a href="http://www.geo.admin.ch/internet/geoportal/' +
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'en/home.html">' +
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'Pixelmap 1:1000000 / geo.admin.ch</a>'
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})],
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params: {
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'LAYERS': 'ch.swisstopo.pixelkarte-farbe-pk1000.noscale',
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'FORMAT': 'image/jpeg'
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},
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extent: extent
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})
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}),
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new ol.layer.Vector({
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source: vectorSource,
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styleFunction: function(feature, resolution) {
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return styleArray;
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}
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})
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];
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var map = new ol.Map({
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controls: ol.control.defaults().extend([
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new ol.control.ScaleLine({
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units: ol.control.ScaleLineUnits.METRIC
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})
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]),
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layers: layers,
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renderer: ol.RendererHint.CANVAS,
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target: 'map',
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view: new ol.View2D({
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projection: projection,
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center: [660000, 190000],
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extent: extent,
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zoom: 2
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})
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});
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var point = null;
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var line = null;
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var displaySnap = function(coordinate) {
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var closestFeature = vectorSource.getClosestFeatureToCoordinate(coordinate);
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if (closestFeature === null) {
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point = null;
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line = null;
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} else {
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var geometry = closestFeature.getGeometry();
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var closestPoint = geometry.getClosestPoint(coordinate);
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if (point === null) {
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point = new ol.geom.Point(closestPoint);
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} else {
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point.setCoordinates(closestPoint);
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}
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if (line === null) {
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line = new ol.geom.LineString([coordinate, closestPoint]);
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} else {
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line.setCoordinates([coordinate, closestPoint]);
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}
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}
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map.requestRenderFrame();
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};
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$(map.getViewport()).on('mousemove', function(evt) {
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var coordinate = map.getEventCoordinate(evt.originalEvent);
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displaySnap(coordinate);
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});
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map.on('singleclick', function(evt) {
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var coordinate = evt.getCoordinate();
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displaySnap(coordinate);
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});
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var imageStyle = ol.shape.renderCircle(5, null, new ol.style.Stroke({
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color: 'rgba(255,0,0,0.9)',
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width: 1
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}));
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var strokeStyle = new ol.style.Stroke({
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color: 'rgba(255,0,0,0.9)',
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width: 1
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});
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map.on('postcompose', function(evt) {
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var render = evt.getRender();
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if (point !== null) {
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render.setImageStyle(imageStyle);
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render.drawPointGeometry(point);
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}
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if (line !== null) {
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render.setFillStrokeStyle(null, strokeStyle);
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render.drawLineStringGeometry(line);
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}
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});
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