sources.json

{
    "references": {
        "scales": [
            "http://gis.stackexchange.com/questions/7430/what-ratio-scales-do-google-maps-zoom-levels-correspond-to", 
            "http://webhelp.esri.com/arcgisserver/9.3/java/index.htm#designing_overlay_gm_mve.htm", 
            "http://webhelp.esri.com/arcgisserver/9.3/java/gmaps_ve_scales.txt"
        ], 
        "maps": [
            "https://github.com/nst/gmap_tiles/blob/master/download_tiles.py", 
            "https://groups.google.com/forum/#!topic/google-maps-api/3RvxRebArfg", 
            "https://community.tableau.com/message/277962"
        ],
        "coordinates": [
            "https://groups.google.com/forum/#!topic/Google-Maps-API/NICY9wcl_JY",
            "http://stackoverflow.com/questions/6671183/calculate-the-center-point-of-multiple-latitude-longitude-coordinate-pairs",
            "developers.google.com/maps/documentation/javascript/examples/map-coordinates",
            "http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection",
            "http://janmatuschek.de/LatitudeLongitudeBoundingCoordinates"
        ]
    }, 
    "scales": {
        "1": "591657550.500000", 
        "10": "1155581.153000", 
        "11": "577790.576700", 
        "12": "288895.288400", 
        "13": "144447.644200", 
        "14": "72223.822090", 
        "15": "36111.911040", 
        "16": "18055.955520", 
        "17": "9027.977761", 
        "18": "4513.988880", 
        "19": "2256.994440", 
        "2": "295828775.300000", 
        "20": "1128.497220", 
        "3": "147914387.600000", 
        "4": "73957193.820000", 
        "5": "36978596.910000", 
        "6": "18489298.450000", 
        "7": "9244649.227000", 
        "8": "4622324.614000", 
        "9": "2311162.307000"
    }, 
    "sources": {
        "-613008836546386633": {
            "ext": "jpg", 
            "name": "Google Satellite", 
            "notes": "Google will blacklist overuse for 24H, v=708 is the API version number which will sometimes be updated and must be correct, and normally discourages direct access like this. The http or https links work equally.", 
            "postfix": "", 
            "prefix": "https://khm2.google.com/kh/v=708&s=Gal", 
            "type": "satellite", 
            "x": "&x=", 
            "y": "&y=", 
            "zoom": "&z="
        }, 
        "2723020510372651838": {
            "ext": "png", 
            "name": "Google Road", 
            "notes": "Google will blacklist overuse for 24H, and normally discourages direct access like this. The http or https links work equally.", 
            "postfix": "", 
            "prefix": "https://mt1.google.com/vt/lyrs=h@162000000&hl=en", 
            "type": "road", 
            "x": "&x=", 
            "y": "&s=&y=", 
            "zoom": "&z="
        }
    }
}