URL like http://.../Z/X/Y.png, where Z is the zoom level, and X and Y identify the tile. Tile numbering schemes There are three main numbering schemes in use: Google Maps / OpenStreetMap: (0 to 2zoom-1, 0 to 2zoom-1) for the range (-180, +85.0511) - (+180, -85.0511) Tile Map Service: (0 to 2zoom-1, 2zoom-1 to 0) for the range (-180, +85.0511) - (+180, -85.0511). (That is, the same as the previous with the Y value flipped.) QuadTrees, used by Microsoft. Standards Several standards exist: Tile Map Service: an early standard supported by OpenLayers. One difference is the y axis is positive southwards in TMS, and northwards in OpenStreetMap. Web Map Tile Service: a more recent Open Geospatial Consortium (OGC) standard. The de facto XYZ standard referred to above. TileJSON: a lightweight JSON description of all the parameters associated with a web map, created by Mapbox. Bing Maps Tile System, using Quadkeys for addressing. Client libraries To display a tiled map in a browser usually requires the support of a web mapping framework. This framework handles the retrieval of tiles, display, caching, and user navigation. Popular frameworks for tiled maps include Google Maps API, OpenLayers and Leaflet. References External links Example of a tiled marine map for boating Web mapping