Vladamir Agafonkin

// API and Attributuion
var osmUrl='http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png';
var osmAttrib='Map data © <a href="http://openstreetmap.org">OpenStreetMap</a> contributors';
 
// Set up the map
var map = new L.Map('map');
var osm = new L.TileLayer(osmUrl, {minZoom: 8, maxZoom: 12, attribution: osmAttrib});		

// Start the map in South-East England
map.setView(new L.LatLng(51.3, 0.7),9);
map.addLayer(osm);

var markers = L.markerClusterGroup();
markers.addLayer(L.marker(getRandomLatLng(map)));
/// Add more layers ...
map.addLayer(markers);

// Initialise the FeatureGroup to store editable layers
var drawnItems = new L.FeatureGroup();
map.addLayer(drawnItems);

// Initialise the draw control and pass it the FeatureGroup of editable layers
var drawControl = new L.Control.Draw({
    edit: {
        featureGroup: drawnItems
    }
});
map.addControl(drawControl);

var map = L.map('map').setView([0, 0], 2);
var attrib = '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
    attribution: attrib
}).addTo(map);

// Add the geocoder 
L.Control.geocoder().addTo(map);

// SWEREF99 TM (EPSG:3006) with map's pixel origin at SWEREF99 TM coordinate (0, 0)
var crs = new L.Proj.CRS('EPSG:3006',
  '+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs',
  {
    resolutions: [ 8192, 4096, 2048, 1024, 512, 256, 128],
    origin: [0, 0]
  });

var map = new L.Map('map', { crs: crs });

L.tileLayer('http://api.geosition.com/tile/osm-bright-3006/{z}/{x}/{y}.png', {
  maxZoom: crs.options.resolutions.length,
  minZoom: 0,
  continuousWorld: true,
  attribution: 'Map data © <a href="http://www.openstreetmap.org/copyright">OpenStreetMap contributors</a>, Imagery © 2013 <a href="http://www.kartena.se/">Kartena</a>'
}).addTo(map);

var pos = L.GeoIP.getPosition();

//Centre the map on the approximate location of the client machine:


// Assumming map initialised
L.GeoIP.centerMapOnPosition(map); 

var heat = L.heatLayer([
    [50.5, 30.5, 0.2], // lat, lng, intensity
    [50.6, 30.4, 0.5],
    // so forth ...
], {radius: 25}).addTo(map);

var map = L.map('map').setView([0, 0], 2);
var attrib = '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
    attribution: attrib
}).addTo(map);

L.control.locate().addTo(map);