aboutsummaryrefslogtreecommitdiffstats
path: root/www/js/map-OpenStreetMap.js
blob: 47ac8f3ec80fdcc88250f18510bbaaafb99db2c0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
function set_map_config(perm) {
    fixmystreet.controls = [
        new OpenLayers.Control.Attribution(),
        new OpenLayers.Control.ArgParser(),
        new OpenLayers.Control.Navigation(),
        new OpenLayers.Control.PanZoomFMS({id: 'fms_pan_zoom' })
    ];
    fixmystreet.map_type = OpenLayers.Layer.OSM.Mapnik;
}

// http://www.openstreetmap.org/openlayers/OpenStreetMap.js (added maxResolution)

/**
 * Namespace: Util.OSM
 */
OpenLayers.Util.OSM = {};

/**
 * Constant: MISSING_TILE_URL
 * {String} URL of image to display for missing tiles
 */
OpenLayers.Util.OSM.MISSING_TILE_URL = "http://www.openstreetmap.org/openlayers/img/404.png";

/**
 * Property: originalOnImageLoadError
 * {Function} Original onImageLoadError function.
 */
OpenLayers.Util.OSM.originalOnImageLoadError = OpenLayers.Util.onImageLoadError;

/**
 * Function: onImageLoadError
 */
OpenLayers.Util.onImageLoadError = function() {
    if (this.src.match(/^http:\/\/[abc]\.[a-z]+\.openstreetmap\.org\//)) {
        this.src = OpenLayers.Util.OSM.MISSING_TILE_URL;
    } else if (this.src.match(/^http:\/\/[def]\.tah\.openstreetmap\.org\//)) {
        // do nothing - this layer is transparent
    } else {
        OpenLayers.Util.OSM.originalOnImageLoadError();
    }
};

/**
 * Class: OpenLayers.Layer.OSM.Mapnik
 *
 * Inherits from:
 *  - <OpenLayers.Layer.OSM>
 */
OpenLayers.Layer.OSM.Mapnik = OpenLayers.Class(OpenLayers.Layer.OSM, {
    /**
     * Constructor: OpenLayers.Layer.OSM.Mapnik
     *
     * Parameters:
     * name - {String}
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, options) {
        var url = [
            "https://a.tile.openstreetmap.org/${z}/${x}/${y}.png",
            "https://b.tile.openstreetmap.org/${z}/${x}/${y}.png",
            "https://c.tile.openstreetmap.org/${z}/${x}/${y}.png"
        ];
        options = OpenLayers.Util.extend({
            /* Below line added to OSM's file in order to allow minimum zoom level */
            maxResolution: 156543.03390625/Math.pow(2, options.zoomOffset || 0),
            numZoomLevels: 19,
            buffer: 0
        }, options);
        var newArguments = [name, url, options];
        OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
    },

    CLASS_NAME: "OpenLayers.Layer.OSM.Mapnik"
});

/**
 * Class: OpenLayers.Layer.OSM.CycleMap
 *
 * Inherits from:
 *  - <OpenLayers.Layer.OSM>
 */
OpenLayers.Layer.OSM.CycleMap = OpenLayers.Class(OpenLayers.Layer.OSM, {
    /**
     * Constructor: OpenLayers.Layer.OSM.CycleMap
     *
     * Parameters:
     * name - {String}
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, options) {
        var url = [
            "http://a.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
            "http://b.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
            "http://c.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png"
        ];
        options = OpenLayers.Util.extend({
            /* Below line added to OSM's file in order to allow minimum zoom level */
            maxResolution: 156543.03390625/Math.pow(2, options.zoomOffset || 0),
            numZoomLevels: 19,
            buffer: 0
        }, options);
        var newArguments = [name, url, options];
        OpenLayers.Layer.OSM.prototype.initialize.apply(this, newArguments);
    },

    CLASS_NAME: "OpenLayers.Layer.OSM.CycleMap"
});