mirror of
https://github.com/jiawanlong/Cesium-Examples.git
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172 lines
5.4 KiB
HTML
172 lines
5.4 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<title>Proj4js</title>
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<style type="text/css">
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@import url(test/base.css);
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#descSource, #descDest {
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font-style: italic;
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color: #999;
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}
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#xySource, #xyDest {
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width: 100%;
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}
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</style>
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<script src="lib/proj4js.js"></script>
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<script src="lib/defs/EPSG27200.js"></script>
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<script src="lib/defs/EPSG4272.js"></script>
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<script src="lib/defs/EPSG54009.js"></script>
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<script src="lib/defs/EPSG42304.js"></script>
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<script src="lib/defs/EPSG25833.js"></script>
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<script src="lib/defs/EPSG27563.js"></script>
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<script src="lib/defs/EPSG4139.js"></script>
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<script src="lib/defs/EPSG4302.js"></script>
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<script src="lib/defs/EPSG31285.js"></script>
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<script src="lib/defs/EPSG900913.js"></script>
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<script type="text/javascript">
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var projHash = {};
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function initProj4js() {
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var crsSource = document.getElementById('crsSource');
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var crsDest = document.getElementById('crsDest');
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var optIndex = 0;
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for (var def in Proj4js.defs) {
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projHash[def] = new Proj4js.Proj(def); //create a Proj for each definition
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var label = def+" - "+ (projHash[def].title ? projHash[def].title : '');
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var opt = new Option(label, def);
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crsSource.options[optIndex]= opt;
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var opt = new Option(label, def);
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crsDest.options[optIndex]= opt;
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++optIndex;
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} // for
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updateCrs('Source');
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updateCrs('Dest');
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}
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function updateCrs(id) {
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var crs = document.getElementById('crs'+id);
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if (crs.value) {
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var proj = projHash[crs.value];
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var str = 'projection: ' + proj.projName + ' - datum: ' + proj.datumName;
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var desc = document.getElementById('desc'+id);
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desc.innerHTML = str;
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var units = document.getElementById('units'+id);
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units.innerHTML = proj.units;
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}
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}
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function transform() {
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var crsSource = document.getElementById('crsSource');
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var projSource = null;
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if (crsSource.value) {
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projSource = projHash[crsSource.value];
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} else {
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alert("Select a source coordinate system");
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return;
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}
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var crsDest = document.getElementById('crsDest');
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var projDest = null;
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if (crsDest.value) {
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projDest = projHash[crsDest.value];
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} else {
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alert("Select a destination coordinate system");
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return;
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}
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var pointInput = document.getElementById('xySource');
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if (pointInput.value) {
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var pointSource = new Proj4js.Point(pointInput.value);
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var pointDest = Proj4js.transform(projSource, projDest, pointSource);
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document.getElementById('xyDest').value = pointDest.toShortString();
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} else {
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alert("Enter source coordinates");
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return;
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}
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}
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</script>
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</head>
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<body onload="initProj4js()">
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<div id="header">
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<h1>Proj4js Home Page</h1>
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</div>
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<div id="navbar">
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<a href="http://trac.osgeo.org/proj4js">Proj4js Wiki/Trac</a> |
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<a href="http://wiki.osgeo.org/wiki/MetaCRS">OSGeo MetaCRS</a> |
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<a href="http://spatialreference.org/">spatialreference.org</a> |
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<a href="http://communitymapbuilder.org/">MapBuilder</a> |
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<a href="http://openlayers.org/">OpenLayers</a> |
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</div>
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<h1>Welcome to Proj4js</h1>
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<p>
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This is a JavaScript library that provides methods for coordinate
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transformations between map projections and longitude/latitude,
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including datum transformations, in a web client.
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</p>
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<p>
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To use the Proj4js, you first create a source and destination Proj4js.Proj
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objects, passing in a projection code (e.g. EPSG:4326).
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You can then use the Proj4js.transform() method, passing in map XY as a point
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object and the source and destination projection objects,
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and it returns the point coordinate in the destination projection.
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</p>
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<form>
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<table>
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<tbody>
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<tr>
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<th colspan="3">source</th>
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<th></th>
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<th colspan="3">dest</th>
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</tr>
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<tr>
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<td>CRS:</td>
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<td colspan="2">
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<select name="crsSource" id="crsSource" onchange="updateCrs('Source')">
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<option value selected="selected">Select a CRS</option>
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</select>
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</td>
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<td></td>
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<td>CRS:</td>
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<td colspan="2">
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<select name="crsDest" id="crsDest" onchange="updateCrs('Dest')">
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<option value selected="selected">Select a CRS</option>
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</select>
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</td>
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</tr>
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<tr>
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<td></td>
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<td colspan="2" id="descSource">Projection - datum</td>
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<td></td>
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<td></td>
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<td colspan="2" id="descDest">Projection - datum</td>
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</tr>
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<tr>
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<td>x,y</td>
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<td><input name="xySource" id="xySource" type="text"/></td>
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<td id="unitsSource">units</td>
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<td><input type="button" value="--> transform -->" onclick="transform();"/></td>
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<td>x,y</td>
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<td><input name="xyDest" id="xyDest" type="text"></td>
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<td id="unitsDest">units</td>
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</tr>
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<tr>
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<td colspan="7" align="center"><input type="reset" value="reset"/></td>
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</tr>
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</tbody>
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</table>
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</form>
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<p>
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For more information on Proj4js and to report bugs, please visit the
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<a href="http://trac.osgeo.org/proj4js">Proj4js Trac and Wiki</a> at OSGeo.
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</p>
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</body>
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</html> |