website/js/OpenStreetMap.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}/${y}.png"
  50         ];
  51         options = OpenLayers.Util.extend({ numZoomLevels: 19, buffer: 0 }, options);
  52         var newArguments = [name, url, options];
  53         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
  54     },
  55
  56     CLASS_NAME: "OpenLayers.Layer.OSM.Mapnik"
  57 });
  58
  59 /**
  60  * Class: OpenLayers.Layer.OSM.Osmarender
  61  *
  62  * Inherits from:
  63  *  - <OpenLayers.Layer.OSM>
  64  */
  65 OpenLayers.Layer.OSM.Osmarender = OpenLayers.Class(OpenLayers.Layer.OSM, {
  66     /**
  67      * Constructor: OpenLayers.Layer.OSM.Osmarender
  68      *
  69      * Parameters:
  70      * name - {String}
  71      * options - {Object} Hashtable of extra options to tag onto the layer
  72      */
  73     initialize: function(name, options) {
  74         var url = [
  75             "http://a.tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png",
  76             "http://b.tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png",
  77             "http://c.tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png"
  78         ];
  79         options = OpenLayers.Util.extend({ numZoomLevels: 18, buffer: 0 }, options);
  80         var newArguments = [name, url, options];
  81         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
  82     },
  83
  84     CLASS_NAME: "OpenLayers.Layer.OSM.Osmarender"
  85 });
  86
  87 /**
  88  * Class: OpenLayers.Layer.OSM.CycleMap
  89  *
  90  * Inherits from:
  91  *  - <OpenLayers.Layer.OSM>
  92  */
  93 OpenLayers.Layer.OSM.CycleMap = OpenLayers.Class(OpenLayers.Layer.OSM, {
  94     /**
  95      * Constructor: OpenLayers.Layer.OSM.CycleMap
  96      *
  97      * Parameters:
  98      * name - {String}
  99      * options - {Object} Hashtable of extra options to tag onto the layer
 100      */
 101     initialize: function(name, options) {
 102         var url = [
 103             "http://a.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
 104             "http://b.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
 105             "http://c.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png"
 106         ];
 107         options = OpenLayers.Util.extend({ numZoomLevels: 19, buffer: 0 }, options);
 108         var newArguments = [name, url, options];
 109         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
 110     },
 111
 112     CLASS_NAME: "OpenLayers.Layer.OSM.CycleMap"
 113 });