1 |
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2 | goog.require('ol.Map');
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3 | goog.require('ol.View');
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4 | goog.require('ol.control');
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5 | goog.require('ol.format.WKT');
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6 | goog.require('ol.layer.Tile');
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7 | goog.require('ol.layer.Vector');
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8 | goog.require('ol.source.OSM');
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9 | goog.require('ol.source.Vector');
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10 |
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11 | var raster = new ol.layer.Tile({
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12 | source: new ol.source.OSM()
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13 | });
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14 |
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15 | var format = new ol.format.WKT();
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16 | var feature = format.readFeature(
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17 | 'POLYGON((10.689697265625 -25.0927734375, 34.595947265625 ' +
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18 | '-20.1708984375, 38.814697265625 -35.6396484375, 13.502197265625 ' +
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19 | '-39.1552734375, 10.689697265625 -25.0927734375))');
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20 | feature.getGeometry().transform('EPSG:4326', 'EPSG:3857');
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21 |
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22 | var vector = new ol.layer.Vector({
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23 | source: new ol.source.Vector({
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24 | features: [feature]
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25 | })
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26 | });
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27 |
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28 |
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29 | var map = new ol.Map({
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30 | layers: [raster, vector],
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31 | target: 'map',
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32 | controls: ol.control.defaults({
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33 | attributionOptions: ({
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34 | collapsible: false
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35 | })
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36 | }),
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37 | view: new ol.View({
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38 | center: [0, 0],
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39 | zoom: 2
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40 | })
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41 | });
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42 |
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43 |
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44 | var dims = {
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45 | a0: [1189, 841],
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46 | a1: [841, 594],
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47 | a2: [594, 420],
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48 | a3: [420, 297],
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49 | a4: [297, 210],
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50 | a5: [210, 148]
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51 | };
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52 |
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53 | var loading = 0;
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54 | var loaded = 0;
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55 |
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56 | var exportButton = document.getElementById('export-pdf');
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57 |
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58 | exportButton.addEventListener('click', function() {
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59 |
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60 | exportButton.disabled = true;
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61 | document.body.style.cursor = 'progress';
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62 |
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63 | var format = document.getElementById('format').value;
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64 | var resolution = document.getElementById('resolution').value;
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65 | var dim = dims[format];
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66 | var width = Math.round(dim[0] * resolution / 25.4);
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67 | var height = Math.round(dim[1] * resolution / 25.4);
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68 | var size = (map.getSize());
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69 | var extent = map.getView().calculateExtent(size);
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70 |
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71 | var source = raster.getSource();
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72 |
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73 | var tileLoadStart = function() {
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74 | ++loading;
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75 | };
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76 |
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77 | var tileLoadEnd = function() {
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78 | ++loaded;
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79 | if (loading === loaded) {
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80 | var canvas = this;
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81 | window.setTimeout(function() {
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82 | loading = 0;
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83 | loaded = 0;
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84 | var data = canvas.toDataURL('image/png');
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85 | var pdf = new jsPDF('landscape', undefined, format);
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86 | pdf.addImage(data, 'JPEG', 0, 0, dim[0], dim[1]);
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87 | pdf.save('map.pdf');
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88 | source.un('tileloadstart', tileLoadStart);
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89 | source.un('tileloadend', tileLoadEnd, canvas);
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90 | source.un('tileloaderror', tileLoadEnd, canvas);
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91 | map.setSize(size);
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92 | map.getView().fit(extent);
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93 | map.renderSync();
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94 | exportButton.disabled = false;
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95 | document.body.style.cursor = 'auto';
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96 | }, 100);
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97 | }
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98 | };
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99 |
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100 | map.once('postcompose', function(event) {
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101 | source.on('tileloadstart', tileLoadStart);
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102 | source.on('tileloadend', tileLoadEnd, event.context.canvas);
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103 | source.on('tileloaderror', tileLoadEnd, event.context.canvas);
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104 | });
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105 |
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106 | map.setSize([width, height]);
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107 | map.getView().fit(extent);
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108 | map.renderSync();
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109 |
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110 | }, false);
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