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}/${y}.png"
  50         ];
  51         options = OpenLayers.Util.extend({
  52             numZoomLevels: 19,
  53             buffer: 0,
  54             transitionEffect: "resize"
  55         }, options);
  56         var newArguments = [name, url, options];
  57         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
  58     },
  59
  60     CLASS_NAME: "OpenLayers.Layer.OSM.Mapnik"
  61 });
  62
  63 /**
  64  * Class: OpenLayers.Layer.OSM.Osmarender
  65  *
  66  * Inherits from:
  67  *  - <OpenLayers.Layer.OSM>
  68  */
  69 OpenLayers.Layer.OSM.Osmarender = OpenLayers.Class(OpenLayers.Layer.OSM, {
  70     /**
  71      * Constructor: OpenLayers.Layer.OSM.Osmarender
  72      *
  73      * Parameters:
  74      * name - {String}
  75      * options - {Object} Hashtable of extra options to tag onto the layer
  76      */
  77     initialize: function(name, options) {
  78         var url = [
  79             "http://a.tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png",
  80             "http://b.tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png",
  81             "http://c.tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png"
  82         ];
  83         options = OpenLayers.Util.extend({
  84             numZoomLevels: 18,
  85             buffer: 0,
  86             transitionEffect: "resize"
  87         }, options);
  88         var newArguments = [name, url, options];
  89         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
  90     },
  91
  92     CLASS_NAME: "OpenLayers.Layer.OSM.Osmarender"
  93 });
  94
  95 /**
  96  * Class: OpenLayers.Layer.OSM.CycleMap
  97  *
  98  * Inherits from:
  99  *  - <OpenLayers.Layer.OSM>
 100  */
 101 OpenLayers.Layer.OSM.CycleMap = OpenLayers.Class(OpenLayers.Layer.OSM, {
 102     /**
 103      * Constructor: OpenLayers.Layer.OSM.CycleMap
 104      *
 105      * Parameters:
 106      * name - {String}
 107      * options - {Object} Hashtable of extra options to tag onto the layer
 108      */
 109     initialize: function(name, options) {
 110         var url = [
 111             "http://a.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
 112             "http://b.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
 113             "http://c.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png"
 114         ];
 115         options = OpenLayers.Util.extend({
 116             numZoomLevels: 19,
 117             buffer: 0,
 118             transitionEffect: "resize"
 119         }, options);
 120         var newArguments = [name, url, options];
 121         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
 122     },
 123
 124     CLASS_NAME: "OpenLayers.Layer.OSM.CycleMap"
 125 });