[76] | 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
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| 2 | <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> |
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| 3 | <head> |
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| 4 | <title>Proj4js</title> |
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| 5 | |
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| 6 | <style type="text/css"> |
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| 7 | @import url(test/base.css); |
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| 8 | |
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| 9 | #descSource, #descDest { |
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| 10 | font-style: italic; |
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| 11 | color: #999; |
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| 12 | } |
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| 13 | |
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| 14 | #xySource, #xyDest { |
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| 15 | width: 100%; |
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| 16 | } |
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| 17 | |
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| 18 | </style> |
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| 19 | |
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| 20 | <script src="lib/proj4js.js"></script> |
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| 21 | |
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| 22 | <script src="lib/defs/EPSG27200.js"></script> |
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| 23 | <script src="lib/defs/EPSG4272.js"></script> |
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| 24 | <script src="lib/defs/EPSG54009.js"></script> |
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| 25 | <script src="lib/defs/EPSG42304.js"></script> |
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| 26 | <script src="lib/defs/EPSG25833.js"></script> |
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| 27 | <script src="lib/defs/EPSG27563.js"></script> |
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| 28 | <script src="lib/defs/EPSG4139.js"></script> |
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| 29 | <script src="lib/defs/EPSG4302.js"></script> |
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| 30 | <script src="lib/defs/EPSG31285.js"></script> |
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| 31 | <script src="lib/defs/EPSG900913.js"></script> |
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| 32 | |
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| 33 | <script type="text/javascript"> |
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| 34 | |
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| 35 | var projHash = {}; |
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| 36 | function initProj4js() { |
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| 37 | var crsSource = document.getElementById('crsSource'); |
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| 38 | var crsDest = document.getElementById('crsDest'); |
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| 39 | var optIndex = 0; |
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| 40 | for (var def in Proj4js.defs) { |
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| 41 | projHash[def] = new Proj4js.Proj(def); //create a Proj for each definition |
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| 42 | var label = def+" - "+ (projHash[def].title ? projHash[def].title : ''); |
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| 43 | var opt = new Option(label, def); |
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| 44 | crsSource.options[optIndex]= opt; |
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| 45 | var opt = new Option(label, def); |
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| 46 | crsDest.options[optIndex]= opt; |
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| 47 | ++optIndex; |
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| 48 | } // for |
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| 49 | updateCrs('Source'); |
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| 50 | updateCrs('Dest'); |
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| 51 | } |
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| 52 | |
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| 53 | function updateCrs(id) { |
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| 54 | var crs = document.getElementById('crs'+id); |
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| 55 | if (crs.value) { |
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| 56 | var proj = projHash[crs.value]; |
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| 57 | var str = 'projection: ' + proj.projName + ' - datum: ' + proj.datumName; |
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| 58 | var desc = document.getElementById('desc'+id); |
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| 59 | desc.innerHTML = str; |
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| 60 | var units = document.getElementById('units'+id); |
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| 61 | units.innerHTML = proj.units; |
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| 62 | } |
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| 63 | } |
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| 64 | |
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| 65 | function transform() { |
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| 66 | var crsSource = document.getElementById('crsSource'); |
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| 67 | var projSource = null; |
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| 68 | if (crsSource.value) { |
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| 69 | projSource = projHash[crsSource.value]; |
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| 70 | } else { |
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| 71 | alert("Select a source coordinate system"); |
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| 72 | return; |
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| 73 | } |
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| 74 | var crsDest = document.getElementById('crsDest'); |
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| 75 | var projDest = null; |
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| 76 | if (crsDest.value) { |
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| 77 | projDest = projHash[crsDest.value]; |
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| 78 | } else { |
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| 79 | alert("Select a destination coordinate system"); |
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| 80 | return; |
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| 81 | } |
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| 82 | var pointInput = document.getElementById('xySource'); |
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| 83 | if (pointInput.value) { |
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| 84 | var pointSource = new Proj4js.Point(pointInput.value); |
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| 85 | var pointDest = Proj4js.transform(projSource, projDest, pointSource); |
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| 86 | document.getElementById('xyDest').value = pointDest.toShortString(); |
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| 87 | } else { |
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| 88 | alert("Enter source coordinates"); |
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| 89 | return; |
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| 90 | } |
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| 91 | } |
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| 92 | |
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| 93 | </script> |
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| 94 | </head> |
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| 95 | |
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| 96 | <body onload="initProj4js()"> |
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| 97 | <div id="header"> |
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| 98 | <h1>Proj4js Home Page</h1> |
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| 99 | </div> |
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| 100 | <div id="navbar"> |
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| 101 | <a href="http://trac.osgeo.org/proj4js">Proj4js Wiki/Trac</a> | |
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| 102 | <a href="http://wiki.osgeo.org/wiki/MetaCRS">OSGeo MetaCRS</a> | |
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| 103 | <a href="http://spatialreference.org/">spatialreference.org</a> | |
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| 104 | <a href="http://communitymapbuilder.org/">MapBuilder</a> | |
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| 105 | <a href="http://openlayers.org/">OpenLayers</a> | |
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| 106 | </div> |
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| 107 | <h1>Welcome to Proj4js</h1> |
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| 108 | <p> |
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| 109 | This is a JavaScript library that provides methods for coordinate |
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| 110 | transformations between map projections and longitude/latitude, |
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| 111 | including datum transformations, in a web client. |
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| 112 | </p> |
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| 113 | |
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| 114 | <p> |
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| 115 | To use the Proj4js, you first create a source and destination Proj4js.Proj |
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| 116 | objects, passing in a projection code (e.g. EPSG:4326). |
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| 117 | You can then use the Proj4js.transform() method, passing in map XY as a point |
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| 118 | object and the source and destination projection objects, |
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| 119 | and it returns the point coordinate in the destination projection. |
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| 120 | </p> |
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| 121 | <form> |
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| 122 | <table> |
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| 123 | <tbody> |
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| 124 | <tr> |
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| 125 | <th colspan="3">source</th> |
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| 126 | <th></th> |
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| 127 | <th colspan="3">dest</th> |
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| 128 | </tr> |
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| 129 | <tr> |
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| 130 | <td>CRS:</td> |
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| 131 | <td colspan="2"> |
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| 132 | <select name="crsSource" id="crsSource" onchange="updateCrs('Source')"> |
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| 133 | <option value selected="selected">Select a CRS</option> |
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| 134 | </select> |
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| 135 | </td> |
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| 136 | <td></td> |
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| 137 | <td>CRS:</td> |
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| 138 | <td colspan="2"> |
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| 139 | <select name="crsDest" id="crsDest" onchange="updateCrs('Dest')"> |
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| 140 | <option value selected="selected">Select a CRS</option> |
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| 141 | </select> |
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| 142 | </td> |
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| 143 | </tr> |
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| 144 | <tr> |
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| 145 | <td></td> |
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| 146 | <td colspan="2" id="descSource">Projection - datum</td> |
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| 147 | <td></td> |
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| 148 | <td></td> |
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| 149 | <td colspan="2" id="descDest">Projection - datum</td> |
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| 150 | </tr> |
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| 151 | <tr> |
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| 152 | <td>x,y</td> |
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| 153 | <td><input name="xySource" id="xySource" type="text"/></td> |
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| 154 | <td id="unitsSource">units</td> |
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| 155 | <td><input type="button" value="--> transform -->" onclick="transform();"/></td> |
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| 156 | <td>x,y</td> |
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| 157 | <td><input name="xyDest" id="xyDest" type="text"></td> |
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| 158 | <td id="unitsDest">units</td> |
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| 159 | </tr> |
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| 160 | <tr> |
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| 161 | <td colspan="7" align="center"><input type="reset" value="reset"/></td> |
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| 162 | </tr> |
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| 163 | </tbody> |
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| 164 | </table> |
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| 165 | </form> |
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| 166 | <p> |
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| 167 | For more information on Proj4js and to report bugs, please visit the |
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| 168 | <a href="http://trac.osgeo.org/proj4js">Proj4js Trac and Wiki</a> at OSGeo. |
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| 169 | </p> |
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| 170 | |
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| 171 | </body> |
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| 172 | </html> |
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