website/js/tiles.js

   1 /**
   2  * Namespace: Util.OSM
   3  */
   4 OpenLayers.Util.OSM = {};
   5
   6 /**
   7  * Constant: MISSING_TILE_URL
   8  * {String} URL of image to display for missing tiles
   9  */
  10 OpenLayers.Util.OSM.MISSING_TILE_URL = "http://www.openstreetmap.org/openlayers/img/404.png";
  11
  12 /**
  13  * Property: originalOnImageLoadError
  14  * {Function} Original onImageLoadError function.
  15  */
  16 OpenLayers.Util.OSM.originalOnImageLoadError = OpenLayers.Util.onImageLoadError;
  17
  18 /**
  19  * Function: onImageLoadError
  20  */
  21 OpenLayers.Util.onImageLoadError = function() {
  22     if (this.src.match(/^http:\/\/[abc]\.[a-z]+\.openstreetmap\.org\//)) {
  23         this.src = OpenLayers.Util.OSM.MISSING_TILE_URL;
  24     } else if (this.src.match(/^http:\/\/[def]\.tah\.openstreetmap\.org\//)) {
  25         // do nothing - this layer is transparent
  26     } else {
  27         OpenLayers.Util.OSM.originalOnImageLoadError;
  28     }
  29 };
  30
  31 /**
  32  * Class: OpenLayers.Layer.OSM.Mapnik
  33  *
  34  * Inherits from:
  35  *  - <OpenLayers.Layer.OSM>
  36  */
  37 OpenLayers.Layer.OSM.Mapnik = OpenLayers.Class(OpenLayers.Layer.OSM, {
  38     /**
  39      * Constructor: OpenLayers.Layer.OSM.Mapnik
  40      *
  41      * Parameters:
  42      * name - {String}
  43      * options - {Object} Hashtable of extra options to tag onto the layer
  44      */
  45     initialize: function(name, options) {
  46         var url = [
  47             "http://a.tile.openstreetmap.org/${z}/${x}/${y}.png",
  48             "http://b.tile.openstreetmap.org/${z}/${x}/${y}.png",
  49             "http://c.tile.openstreetmap.org/${z}/${x}/${y}.png"
  50         ];
  51         options = OpenLayers.Util.extend({ numZoomLevels: 19, buffer: 0,
  52            attribution : '© <a target="_parent" href="http://www.openstreetmap.org">OpenStreetMap</a> and contributors, under an <a target="_parent" href="http://www.openstreetmap.org/copyright">open license</a>' }, options);
  53         var newArguments = [name, url, options];
  54         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
  55     },
  56
  57     CLASS_NAME: "OpenLayers.Layer.OSM.Mapnik"
  58 });
  59
  60 /**
  61  * Class: OpenLayers.Layer.OSM.MapQuestOpen
  62  *
  63  * Inherits from:
  64  *  - <OpenLayers.Layer.OSM>
  65  */
  66 OpenLayers.Layer.OSM.MapQuestOpen = OpenLayers.Class(OpenLayers.Layer.OSM, {
  67     /**
  68      * Constructor: OpenLayers.Layer.OSM.MapQuestOpen
  69      *
  70      * Parameters:
  71      * name - {String}
  72      * options - {Object} Hashtable of extra options to tag onto the layer
  73      */
  74     initialize: function(name, options) {
  75         var url = [
  76             "http://otile1.mqcdn.com/tiles/1.0.0/osm/${z}/${x}/${y}.png",
  77             "http://otile2.mqcdn.com/tiles/1.0.0/osm/${z}/${x}/${y}.png",
  78             "http://otile3.mqcdn.com/tiles/1.0.0/osm/${z}/${x}/${y}.png",
  79             "http://otile4.mqcdn.com/tiles/1.0.0/osm/${z}/${x}/${y}.png"
  80         ];
  81         options = OpenLayers.Util.extend({ numZoomLevels: 19, buffer: 0 }, options);
  82         var newArguments = [name, url, options];
  83         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
  84     },
  85
  86     CLASS_NAME: "OpenLayers.Layer.OSM.MapQuestOpen"
  87 });
  88
  89 /**
  90  * Class: OpenLayers.Layer.OSM.CycleMap
  91  *
  92  * Inherits from:
  93  *  - <OpenLayers.Layer.OSM>
  94  */
  95 OpenLayers.Layer.OSM.CycleMap = OpenLayers.Class(OpenLayers.Layer.OSM, {
  96     /**
  97      * Constructor: OpenLayers.Layer.OSM.CycleMap
  98      *
  99      * Parameters:
 100      * name - {String}
 101      * options - {Object} Hashtable of extra options to tag onto the layer
 102      */
 103     initialize: function(name, options) {
 104         var url = [
 105             "http://a.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
 106             "http://b.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
 107             "http://c.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png"
 108         ];
 109         options = OpenLayers.Util.extend({ numZoomLevels: 19, buffer: 0 }, options);
 110         var newArguments = [name, url, options];
 111         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
 112     },
 113
 114     CLASS_NAME: "OpenLayers.Layer.OSM.CycleMap"
 115 });