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externalProjection properties. These allow for the reprojection of data -- OpenLayers users with SphericalMercator get this built in for EPSG:900913, and other users can use the external proj4js library available from MapBuilder SVN to add support for any number of projections. This means that featres can be, for example, transformed from a KML doc in 4326 to Spherical Mercator before being added to a layer, making using SphericalMercator slightly more enticing. r=elemoine (Closes #1039) git-svn-id: http://svn.openlayers.org/trunk/openlayers@5516 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
214 lines
7.5 KiB
HTML
214 lines
7.5 KiB
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Vector Formats</title>
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<style type="text/css">
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html, body {
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margin: 0;
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padding: 1em;
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font: 0.9em Verdana, Arial, sans serif;
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}
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input, select, textarea {
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font: 0.9em Verdana, Arial, sans-serif;
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}
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h2 {
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margin-top: 0.75em;
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font-size: 1.6em;
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}
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#leftcol {
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position: absolute;
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top: 0;
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left: 1em;
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padding: 0;
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width: 517px;
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}
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#map {
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width: 512px;
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height: 225px;
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border: 1px solid #ccc;
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}
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#input {
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width: 512px;
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}
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#text {
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font-size: 0.85em;
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margin: 1em 0 1em 0;
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width: 100%;
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height: 10em;
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}
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#info {
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position: relative;
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padding: 2em 0;
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margin-left: 540px;
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}
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#output {
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font-size: 0.8em;
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width: 100%;
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height: 512px;
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border: 0;
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}
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p {
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margin: 0;
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padding: 0.75em 0 0.75em 0;
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}
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</style>
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<script src="../lib/Firebug/firebug.js"></script>
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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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var map, vectors, formats;
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function updateFormats() {
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var in_options = {
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'internalProjection': map.baseLayer.projection,
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'externalProjection': new OpenLayers.Projection(OpenLayers.Util.getElement("inproj").value)
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}
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var out_options = {
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'internalProjection': map.baseLayer.projection,
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'externalProjection': new OpenLayers.Projection(OpenLayers.Util.getElement("outproj").value)
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}
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formats = {
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'in': {
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wkt: new OpenLayers.Format.WKT(in_options),
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geojson: new OpenLayers.Format.GeoJSON(in_options),
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georss: new OpenLayers.Format.GeoRSS(in_options),
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gml: new OpenLayers.Format.GML(in_options),
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kml: new OpenLayers.Format.KML(in_options)
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},
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'out': {
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wkt: new OpenLayers.Format.WKT(out_options),
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geojson: new OpenLayers.Format.GeoJSON(out_options),
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georss: new OpenLayers.Format.GeoRSS(out_options),
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gml: new OpenLayers.Format.GML(out_options),
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kml: new OpenLayers.Format.KML(out_options)
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}
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};
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}
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function init(){
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map = new OpenLayers.Map('map');
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var wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
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"http://labs.metacarta.com/wms/vmap0?", {layers: 'basic'});
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vectors = new OpenLayers.Layer.Vector("Vector Layer");
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map.addLayers([wms, vectors]);
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map.addControl(new OpenLayers.Control.MousePosition());
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map.addControl(new OpenLayers.Control.EditingToolbar(vectors));
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var options = {
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hover: true,
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onSelect: serialize
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};
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var select = new OpenLayers.Control.SelectFeature(vectors, options);
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map.addControl(select);
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select.activate();
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updateFormats();
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map.setCenter(new OpenLayers.LonLat(0, 0), 1);
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}
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function serialize(feature) {
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var type = document.getElementById("formatType").value;
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// second argument for pretty printing (geojson only)
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var pretty = document.getElementById("prettyPrint").checked;
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var str = formats['out'][type].write(feature, pretty);
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// not a good idea in general, just for this demo
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str = str.replace(/,/g, ', ');
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document.getElementById('output').value = str;
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}
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function deserialize() {
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var element = document.getElementById('text');
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var type = document.getElementById("formatType").value;
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var features = formats['in'][type].read(element.value);
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var bounds;
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if(features) {
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if(features.constructor != Array) {
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features = [features];
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}
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for(var i=0; i<features.length; ++i) {
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if (!bounds) {
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bounds = features[i].geometry.getBounds();
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} else {
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bounds.extend(features[i].geometry.getBounds());
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}
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}
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vectors.addFeatures(features);
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map.zoomToExtent(bounds);
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var plural = (features.length > 1) ? 's' : '';
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element.value = features.length + ' feature' + plural + ' added'
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} else {
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element.value = 'Bad input ' + type;
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}
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}
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// preload images
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(function() {
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var roots = ["draw_point", "draw_line", "draw_polygon", "pan"];
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var onImages = [];
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var offImages = [];
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for(var i=0; i<roots.length; ++i) {
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onImages[i] = new Image();
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onImages[i].src = "../theme/default/img/" + roots[i] + "_on.png";
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offImages[i] = new Image();
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offImages[i].src = "../theme/default/img/" + roots[i] + "_on.png";
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}
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})();
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</script>
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</head>
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<body onload="init()">
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<div id="leftcol">
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<h1 id="title">Vector Formats Example</h1>
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<div id="tags">
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</div>
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<p id="shortdesc">
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Shows the wide variety of vector formats that open layers supports.
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</p>
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<div id="map"></div>
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<div id="input">
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<p>Use the drop-down below to select the input/output format
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for vector features. New features can be added by using the drawing
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tools above or by pasting their text representation below.</p>
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<label for="formatType">Format</label>
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<select name="formatType" id="formatType">
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<option value="geojson" selected="selected">GeoJSON</option>
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<option value="kml">KML</option>
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<option value="georss">GeoRSS</option>
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<option value="gml">GML</option>
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<option value="wkt">Well-Known Text (WKT)</option>
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</select>
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<label for="prettyPrint">Pretty print</label>
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<input id="prettyPrint" type="checkbox"
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name="prettyPrint" value="1" />
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<br />
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Input Projection: <select id="inproj" onchange='updateFormats()'>
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<option value="EPSG:4326" selected="selected">EPSG:4326</option>
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<option value="EPSG:900913">Spherical Mercator</option>
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</select> <br />
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Output Projection: <select id="outproj" onchange='updateFormats()'>
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<option value="EPSG:4326" selected="selected">EPSG:4326</option>
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<option value="EPSG:900913">Spherical Mercator</option>
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</select>
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<br />
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<textarea id="text">paste text here...</textarea>
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<br />
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<input type="button" value="add feature" onclick="deserialize();" />
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</div>
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<div id="docs">
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</div>
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</div>
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<div id="info">
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<p>Use the tools to the left to draw new polygons, lines, and points.
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After drawing some new features, hover over a feature to see the
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serialized version below.</p>
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<textarea id="output"></textarea>
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</div>
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</body>
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</html>
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