js/OpenStreetMap.js

   1 /* vim: set expandtab sw=4 ts=4 sts=4: */
   2 /**
   3  * Namespace: Util.OSM
   4  */
   5 OpenLayers.Util.OSM = {};
   6
   7 /**
   8  * Constant: MISSING_TILE_URL
   9  * {String} URL of image to display for missing tiles
  10  */
  11 OpenLayers.Util.OSM.MISSING_TILE_URL = "http://www.openstreetmap.org/openlayers/img/404.png";
  12
  13 /**
  14  * Property: originalOnImageLoadError
  15  * {Function} Original onImageLoadError function.
  16  */
  17 OpenLayers.Util.OSM.originalOnImageLoadError = OpenLayers.Util.onImageLoadError;
  18
  19 /**
  20  * Function: onImageLoadError
  21  */
  22 OpenLayers.Util.onImageLoadError = function () {
  23     if (this.src.match(/^http:\/\/[abc]\.[a-z]+\.openstreetmap\.org\//)) {
  24         this.src = OpenLayers.Util.OSM.MISSING_TILE_URL;
  25     } else if (this.src.match(/^http:\/\/[def]\.tah\.openstreetmap\.org\//)) {
  26         // do nothing - this layer is transparent
  27     } else {
  28         OpenLayers.Util.OSM.originalOnImageLoadError;
  29     }
  30 };
  31
  32 /**
  33  * Class: OpenLayers.Layer.OSM.Mapnik
  34  *
  35  * Inherits from:
  36  *  - <OpenLayers.Layer.OSM>
  37  */
  38 OpenLayers.Layer.OSM.Mapnik = OpenLayers.Class(OpenLayers.Layer.OSM, {
  39     /**
  40      * Constructor: OpenLayers.Layer.OSM.Mapnik
  41      *
  42      * Parameters:
  43      * name - {String}
  44      * options - {Object} Hashtable of extra options to tag onto the layer
  45      */
  46     initialize: function (name, options) {
  47         var url = [
  48             "http://a.tile.openstreetmap.org/${z}/${x}/${y}.png",
  49             "http://b.tile.openstreetmap.org/${z}/${x}/${y}.png",
  50             "http://c.tile.openstreetmap.org/${z}/${x}/${y}.png"
  51         ];
  52         options = OpenLayers.Util.extend({
  53             numZoomLevels: 19,
  54             buffer: 0,
  55             transitionEffect: "resize"
  56         }, options);
  57         var newArguments = [name, url, options];
  58         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
  59     },
  60
  61     CLASS_NAME: "OpenLayers.Layer.OSM.Mapnik"
  62 });
  63
  64 /**
  65  * Class: OpenLayers.Layer.OSM.Osmarender
  66  *
  67  * Inherits from:
  68  *  - <OpenLayers.Layer.OSM>
  69  */
  70 OpenLayers.Layer.OSM.Osmarender = OpenLayers.Class(OpenLayers.Layer.OSM, {
  71     /**
  72      * Constructor: OpenLayers.Layer.OSM.Osmarender
  73      *
  74      * Parameters:
  75      * name - {String}
  76      * options - {Object} Hashtable of extra options to tag onto the layer
  77      */
  78     initialize: function (name, options) {
  79         var url = [
  80             "http://a.tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png",
  81             "http://b.tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png",
  82             "http://c.tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png"
  83         ];
  84         options = OpenLayers.Util.extend({
  85             numZoomLevels: 18,
  86             buffer: 0,
  87             transitionEffect: "resize"
  88         }, options);
  89         var newArguments = [name, url, options];
  90         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
  91     },
  92
  93     CLASS_NAME: "OpenLayers.Layer.OSM.Osmarender"
  94 });
  95
  96 /**
  97  * Class: OpenLayers.Layer.OSM.CycleMap
  98  *
  99  * Inherits from:
 100  *  - <OpenLayers.Layer.OSM>
 101  */
 102 OpenLayers.Layer.OSM.CycleMap = OpenLayers.Class(OpenLayers.Layer.OSM, {
 103     /**
 104      * Constructor: OpenLayers.Layer.OSM.CycleMap
 105      *
 106      * Parameters:
 107      * name - {String}
 108      * options - {Object} Hashtable of extra options to tag onto the layer
 109      */
 110     initialize: function (name, options) {
 111         var url = [
 112             "http://a.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
 113             "http://b.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
 114             "http://c.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png"
 115         ];
 116         options = OpenLayers.Util.extend({
 117             numZoomLevels: 19,
 118             buffer: 0,
 119             transitionEffect: "resize"
 120         }, options);
 121         var newArguments = [name, url, options];
 122         OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
 123     },
 124
 125     CLASS_NAME: "OpenLayers.Layer.OSM.CycleMap"
 126 });