text: (function (root, factory) {
  	if (typeof define === 'function' && define.amd) {
  		// AMD. Register as an anonymous module.
  		define(['leaflet'], factory);
  	} else if (typeof modules === 'object' && module.exports) {
  		// define a Common JS module that relies on 'leaflet'
  		module.exports = factory(require('leaflet'));
  	} else {
  		// Assume Leaflet is loaded into global object L already
  		factory(L);
  	}
  }(this, function (L) {
  	'use strict';
  
  	L.TileLayer.Provider = L.TileLayer.extend({
  		initialize: function (arg, options) {
  			var providers = L.TileLayer.Provider.providers;
  
  			var parts = arg.split('.');
  
  			var providerName = parts[0];
  			var variantName = parts[1];
  
  			if (!providers[providerName]) {
  				throw 'No such provider (' + providerName + ')';
  			}
  
  			var provider = {
  				url: providers[providerName].url,
  				options: providers[providerName].options
  			};
  
  			// overwrite values in provider from variant.
  			if (variantName && 'variants' in providers[providerName]) {
  				if (!(variantName in providers[providerName].variants)) {
  					throw 'No such variant of ' + providerName + ' (' + variantName + ')';
  				}
  				var variant = providers[providerName].variants[variantName];
  				var variantOptions;
  				if (typeof variant === 'string') {
  					variantOptions = {
  						variant: variant
  					};
  				} else {
  					variantOptions = variant.options;
  				}
  				provider = {
  					url: variant.url || provider.url,
  					options: L.Util.extend({}, provider.options, variantOptions)
  				};
  			}
  
  			var forceHTTP = window.location.protocol === 'file:' || provider.options.forceHTTP;
  			if (provider.url.indexOf('//') === 0 && forceHTTP) {
  				provider.url = 'http:' + provider.url;
  			}
  
  			// If retina option is set
  			if (provider.options.retina) {
  				// Check retina screen
  				if (options.detectRetina && L.Browser.retina) {
  					// The retina option will be active now
  					// But we need to prevent Leaflet retina mode
  					options.detectRetina = false;
  				} else {
  					// No retina, remove option
  					provider.options.retina = '';
  				}
  			}
  
  			// replace attribution placeholders with their values from toplevel provider attribution,
  			// recursively
  			var attributionReplacer = function (attr) {
  				if (attr.indexOf('{attribution.') === -1) {
  					return attr;
  				}
  				return attr.replace(/\{attribution.(\w*)\}/,
  					function (match, attributionName) {
  						return attributionReplacer(providers[attributionName].options.attribution);
  					}
  				);
  			};
  			provider.options.attribution = attributionReplacer(provider.options.attribution);
  
  			// Compute final options combining provider options with any user overrides
  			var layerOpts = L.Util.extend({}, provider.options, options);
  			L.TileLayer.prototype.initialize.call(this, provider.url, layerOpts);
  		}
  	});
  
  	/**
  	 * Definition of providers.
  	 * see http://leafletjs.com/reference.html#tilelayer for options in the options map.
  	 */
  
  	L.TileLayer.Provider.providers = {
  		OpenStreetMap: {
  			url: '//{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
  			options: {
  				maxZoom: 19,
  				attribution:
  					'&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
  			},
  			variants: {
  				Mapnik: {},
  				BlackAndWhite: {
  					url: 'http://{s}.tiles.wmflabs.org/bw-mapnik/{z}/{x}/{y}.png',
  					options: {
  						maxZoom: 18
  					}
  				},
  				DE: {
  					url: 'http://{s}.tile.openstreetmap.de/tiles/osmde/{z}/{x}/{y}.png',
  					options: {
  						maxZoom: 18
  					}
  				},
  				France: {
  					url: 'http://{s}.tile.openstreetmap.fr/osmfr/{z}/{x}/{y}.png',
  					options: {
  						attribution: '&copy; Openstreetmap France | {attribution.OpenStreetMap}'
  					}
  				},
  				HOT: {
  					url: 'http://{s}.tile.openstreetmap.fr/hot/{z}/{x}/{y}.png',
  					options: {
  						attribution: '{attribution.OpenStreetMap}, Tiles courtesy of <a href="http://hot.openstreetmap.org/" target="_blank">Humanitarian OpenStreetMap Team</a>'
  					}
  				}
  			}
  		},
  		OpenSeaMap: {
  			url: 'http://tiles.openseamap.org/seamark/{z}/{x}/{y}.png',
  			options: {
  				attribution: 'Map data: &copy; <a href="http://www.openseamap.org">OpenSeaMap</a> contributors'
  			}
  		},
  		OpenTopoMap: {
  			url: '//{s}.tile.opentopomap.org/{z}/{x}/{y}.png',
  			options: {
  				maxZoom: 16,
  				attribution: 'Map data: {attribution.OpenStreetMap}, <a href="http://viewfinderpanoramas.org">SRTM</a> | Map style: &copy; <a href="https://opentopomap.org">OpenTopoMap</a> (<a href="https://creativecommons.org/licenses/by-sa/3.0/">CC-BY-SA</a>)'
  			}
  		},
  		Thunderforest: {
  			url: '//{s}.tile.thunderforest.com/{variant}/{z}/{x}/{y}.png',
  			options: {
  				attribution:
  					'&copy; <a href="http://www.thunderforest.com/">Thunderforest</a>, {attribution.OpenStreetMap}',
  				variant: 'cycle'
  			},
  			variants: {
  				OpenCycleMap: 'cycle',
  				Transport: {
  					options: {
  						variant: 'transport',
  						maxZoom: 19
  					}
  				},
  				TransportDark: {
  					options: {
  						variant: 'transport-dark',
  						maxZoom: 19
  					}
  				},
  				SpinalMap: {
  					options: {
  						variant: 'spinal-map',
  						maxZoom: 11
  					}
  				},
  				Landscape: 'landscape',
  				Outdoors: 'outdoors',
  				Pioneer: 'pioneer'
  			}
  		},
  		OpenMapSurfer: {
  			url: 'http://korona.geog.uni-heidelberg.de/tiles/{variant}/x={x}&y={y}&z={z}',
  			options: {
  				maxZoom: 20,
  				variant: 'roads',
  				attribution: 'Imagery from <a href="http://giscience.uni-hd.de/">GIScience Research Group @ University of Heidelberg</a> &mdash; Map data {attribution.OpenStreetMap}'
  			},
  			variants: {
  				Roads: 'roads',
  				AdminBounds: {
  					options: {
  						variant: 'adminb',
  						maxZoom: 19
  					}
  				},
  				Grayscale: {
  					options: {
  						variant: 'roadsg',
  						maxZoom: 19
  					}
  				}
  			}
  		},
  		Hydda: {
  			url: 'http://{s}.tile.openstreetmap.se/hydda/{variant}/{z}/{x}/{y}.png',
  			options: {
  				variant: 'full',
  				attribution: 'Tiles courtesy of <a href="http://openstreetmap.se/" target="_blank">OpenStreetMap Sweden</a> &mdash; Map data {attribution.OpenStreetMap}'
  			},
  			variants: {
  				Full: 'full',
  				Base: 'base',
  				RoadsAndLabels: 'roads_and_labels'
  			}
  		},
  		MapQuestOpen: {
  			/* Mapquest does support https, but with a different subdomain:
  			 * https://otile{s}-s.mqcdn.com/tiles/1.0.0/{type}/{z}/{x}/{y}.{ext}
  			 * which makes implementing protocol relativity impossible.
  			 */
  			url: 'http://otile{s}.mqcdn.com/tiles/1.0.0/{type}/{z}/{x}/{y}.{ext}',
  			options: {
  				type: 'map',
  				ext: 'jpg',
  				attribution:
  					'Tiles Courtesy of <a href="http://www.mapquest.com/">MapQuest</a> &mdash; ' +
  					'Map data {attribution.OpenStreetMap}',
  				subdomains: '1234'
  			},
  			variants: {
  				OSM: {},
  				Aerial: {
  					options: {
  						type: 'sat',
  						attribution:
  							'Tiles Courtesy of <a href="http://www.mapquest.com/">MapQuest</a> &mdash; ' +
  							'Portions Courtesy NASA/JPL-Caltech and U.S. Depart. of Agriculture, Farm Service Agency'
  					}
  				},
  				HybridOverlay: {
  					options: {
  						type: 'hyb',
  						ext: 'png',
  						opacity: 0.9
  					}
  				}
  			}
  		},
  		MapBox: {
  			url: '//api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token={accessToken}',
  			options: {
  				attribution:
  					'Imagery from <a href="http://mapbox.com/about/maps/">MapBox</a> &mdash; ' +
  					'Map data {attribution.OpenStreetMap}',
  				subdomains: 'abcd'
  			}
  		},
  		Stamen: {
  			url: '//stamen-tiles-{s}.a.ssl.fastly.net/{variant}/{z}/{x}/{y}.{ext}',
  			options: {
  				attribution:
  					'Map tiles by <a href="http://stamen.com">Stamen Design</a>, ' +
  					'<a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a> &mdash; ' +
  					'Map data {attribution.OpenStreetMap}',
  				subdomains: 'abcd',
  				minZoom: 0,
  				maxZoom: 20,
  				variant: 'toner',
  				ext: 'png'
  			},
  			variants: {
  				Toner: 'toner',
  				TonerBackground: 'toner-background',
  				TonerHybrid: 'toner-hybrid',
  				TonerLines: 'toner-lines',
  				TonerLabels: 'toner-labels',
  				TonerLite: 'toner-lite',
  				Watercolor: {
  					options: {
  						variant: 'watercolor',
  						minZoom: 1,
  						maxZoom: 16
  					}
  				},
  				Terrain: {
  					options: {
  						variant: 'terrain',
  						minZoom: 4,
  						maxZoom: 18,
  						bounds: [[22, -132], [70, -56]]
  					}
  				},
  				TerrainBackground: {
  					options: {
  						variant: 'terrain-background',
  						minZoom: 4,
  						maxZoom: 18,
  						bounds: [[22, -132], [70, -56]]
  					}
  				},
  				TopOSMRelief: {
  					options: {
  						variant: 'toposm-color-relief',
  						ext: 'jpg',
  						bounds: [[22, -132], [51, -56]]
  					}
  				},
  				TopOSMFeatures: {
  					options: {
  						variant: 'toposm-features',
  						bounds: [[22, -132], [51, -56]],
  						opacity: 0.9
  					}
  				}
  			}
  		},
  		Esri: {
  			url: '//server.arcgisonline.com/ArcGIS/rest/services/{variant}/MapServer/tile/{z}/{y}/{x}',
  			options: {
  				variant: 'World_Street_Map',
  				attribution: 'Tiles &copy; Esri'
  			},
  			variants: {
  				WorldStreetMap: {
  					options: {
  						attribution:
  							'{attribution.Esri} &mdash; ' +
  							'Source: Esri, DeLorme, NAVTEQ, USGS, Intermap, iPC, NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand), TomTom, 2012'
  					}
  				},
  				DeLorme: {
  					options: {
  						variant: 'Specialty/DeLorme_World_Base_Map',
  						minZoom: 1,
  						maxZoom: 11,
  						attribution: '{attribution.Esri} &mdash; Copyright: &copy;2012 DeLorme'
  					}
  				},
  				WorldTopoMap: {
  					options: {
  						variant: 'World_Topo_Map',
  						attribution:
  							'{attribution.Esri} &mdash; ' +
  							'Esri, DeLorme, NAVTEQ, TomTom, Intermap, iPC, USGS, FAO, NPS, NRCAN, GeoBase, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), and the GIS User Community'
  					}
  				},
  				WorldImagery: {
  					options: {
  						variant: 'World_Imagery',
  						attribution:
  							'{attribution.Esri} &mdash; ' +
  							'Source: Esri, i-cubed, USDA, USGS, AEX, GeoEye, Getmapping, Aerogrid, IGN, IGP, UPR-EGP, and the GIS User Community'
  					}
  				},
  				WorldTerrain: {
  					options: {
  						variant: 'World_Terrain_Base',
  						maxZoom: 13,
  						attribution:
  							'{attribution.Esri} &mdash; ' +
  							'Source: USGS, Esri, TANA, DeLorme, and NPS'
  					}
  				},
  				WorldShadedRelief: {
  					options: {
  						variant: 'World_Shaded_Relief',
  						maxZoom: 13,
  						attribution: '{attribution.Esri} &mdash; Source: Esri'
  					}
  				},
  				WorldPhysical: {
  					options: {
  						variant: 'World_Physical_Map',
  						maxZoom: 8,
  						attribution: '{attribution.Esri} &mdash; Source: US National Park Service'
  					}
  				},
  				OceanBasemap: {
  					options: {
  						variant: 'Ocean_Basemap',
  						maxZoom: 13,
  						attribution: '{attribution.Esri} &mdash; Sources: GEBCO, NOAA, CHS, OSU, UNH, CSUMB, National Geographic, DeLorme, NAVTEQ, and Esri'
  					}
  				},
  				NatGeoWorldMap: {
  					options: {
  						variant: 'NatGeo_World_Map',
  						maxZoom: 16,
  						attribution: '{attribution.Esri} &mdash; National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, iPC'
  					}
  				},
  				WorldGrayCanvas: {
  					options: {
  						variant: 'Canvas/World_Light_Gray_Base',
  						maxZoom: 16,
  						attribution: '{attribution.Esri} &mdash; Esri, DeLorme, NAVTEQ'
  					}
  				}
  			}
  		},
  		OpenWeatherMap: {
  			url: 'http://{s}.tile.openweathermap.org/map/{variant}/{z}/{x}/{y}.png',
  			options: {
  				maxZoom: 19,
  				attribution: 'Map data &copy; <a href="http://openweathermap.org">OpenWeatherMap</a>',
  				opacity: 0.5
  			},
  			variants: {
  				Clouds: 'clouds',
  				CloudsClassic: 'clouds_cls',
  				Precipitation: 'precipitation',
  				PrecipitationClassic: 'precipitation_cls',
  				Rain: 'rain',
  				RainClassic: 'rain_cls',
  				Pressure: 'pressure',
  				PressureContour: 'pressure_cntr',
  				Wind: 'wind',
  				Temperature: 'temp',
  				Snow: 'snow'
  			}
  		},
  		HERE: {
  			/*
  			 * HERE maps, formerly Nokia maps.
  			 * These basemaps are free, but you need an API key. Please sign up at
  			 * http://developer.here.com/getting-started
  			 *
  			 * Note that the base urls contain '.cit' whichs is HERE's
  			 * 'Customer Integration Testing' environment. Please remove for production
  			 * envirionments.
  			 */
  			url:
  				'//{s}.{base}.maps.cit.api.here.com/maptile/2.1/' +
  				'{type}/{mapID}/{variant}/{z}/{x}/{y}/{size}/{format}?' +
  				'app_id={app_id}&app_code={app_code}&lg={language}',
  			options: {
  				attribution:
  					'Map &copy; 1987-2014 <a href="http://developer.here.com">HERE</a>',
  				subdomains: '1234',
  				mapID: 'newest',
  				'app_id': '<insert your app_id here>',
  				'app_code': '<insert your app_code here>',
  				base: 'base',
  				variant: 'normal.day',
  				maxZoom: 20,
  				type: 'maptile',
  				language: 'eng',
  				format: 'png8',
  				size: '256'
  			},
  			variants: {
  				normalDay: 'normal.day',
  				normalDayCustom: 'normal.day.custom',
  				normalDayGrey: 'normal.day.grey',
  				normalDayMobile: 'normal.day.mobile',
  				normalDayGreyMobile: 'normal.day.grey.mobile',
  				normalDayTransit: 'normal.day.transit',
  				normalDayTransitMobile: 'normal.day.transit.mobile',
  				normalNight: 'normal.night',
  				normalNightMobile: 'normal.night.mobile',
  				normalNightGrey: 'normal.night.grey',
  				normalNightGreyMobile: 'normal.night.grey.mobile',
  
  				basicMap: {
  					options: {
  						type: 'basetile'
  					}
  				},
  				mapLabels: {
  					options: {
  						type: 'labeltile',
  						format: 'png'
  					}
  				},
  				trafficFlow: {
  					options: {
  						base: 'traffic',
  						type: 'flowtile'
  					}
  				},
  				carnavDayGrey: 'carnav.day.grey',
  				hybridDay: {
  					options: {
  						base: 'aerial',
  						variant: 'hybrid.day'
  					}
  				},
  				hybridDayMobile: {
  					options: {
  						base: 'aerial',
  						variant: 'hybrid.day.mobile'
  					}
  				},
  				pedestrianDay: 'pedestrian.day',
  				pedestrianNight: 'pedestrian.night',
  				satelliteDay: {
  					options: {
  						base: 'aerial',
  						variant: 'satellite.day'
  					}
  				},
  				terrainDay: {
  					options: {
  						base: 'aerial',
  						variant: 'terrain.day'
  					}
  				},
  				terrainDayMobile: {
  					options: {
  						base: 'aerial',
  						variant: 'terrain.day.mobile'
  					}
  				}
  			}
  		},
  		FreeMapSK: {
  			url: 'http://t{s}.freemap.sk/T/{z}/{x}/{y}.jpeg',
  			options: {
  				minZoom: 8,
  				maxZoom: 16,
  				subdomains: '1234',
  				bounds: [[47.204642, 15.996093], [49.830896, 22.576904]],
  				attribution:
  					'{attribution.OpenStreetMap}, vizualization CC-By-SA 2.0 <a href="http://freemap.sk">Freemap.sk</a>'
  			}
  		},
  		MtbMap: {
  			url: 'http://tile.mtbmap.cz/mtbmap_tiles/{z}/{x}/{y}.png',
  			options: {
  				attribution:
  					'{attribution.OpenStreetMap} &amp; USGS'
  			}
  		},
  		CartoDB: {
  			url: 'http://{s}.basemaps.cartocdn.com/{variant}/{z}/{x}/{y}.png',
  			options: {
  				attribution: '{attribution.OpenStreetMap} &copy; <a href="http://cartodb.com/attributions">CartoDB</a>',
  				subdomains: 'abcd',
  				maxZoom: 19,
  				variant: 'light_all'
  			},
  			variants: {
  				Positron: 'light_all',
  				PositronNoLabels: 'light_nolabels',
  				PositronOnlyLabels: 'light_only_labels',
  				DarkMatter: 'dark_all',
  				DarkMatterNoLabels: 'dark_nolabels',
  				DarkMatterOnlyLabels: 'dark_only_labels'
  			}
  		},
  		HikeBike: {
  			url: 'http://{s}.tiles.wmflabs.org/{variant}/{z}/{x}/{y}.png',
  			options: {
  				maxZoom: 19,
  				attribution: '{attribution.OpenStreetMap}',
  				variant: 'hikebike'
  			},
  			variants: {
  				HikeBike: {},
  				HillShading: {
  					options: {
  						maxZoom: 15,
  						variant: 'hillshading'
  					}
  				}
  			}
  		},
  		BasemapAT: {
  			url: '//maps{s}.wien.gv.at/basemap/{variant}/normal/google3857/{z}/{y}/{x}.{format}',
  			options: {
  				maxZoom: 19,
  				attribution: 'Datenquelle: <a href="www.basemap.at">basemap.at</a>',
  				subdomains: ['', '1', '2', '3', '4'],
  				format: 'png',
  				bounds: [[46.358770, 8.782379], [49.037872, 17.189532]],
  				variant: 'geolandbasemap'
  			},
  			variants: {
  				basemap: 'geolandbasemap',
  				grau: 'bmapgrau',
  				overlay: 'bmapoverlay',
  				highdpi: {
  					options: {
  						variant: 'bmaphidpi',
  						format: 'jpeg'
  					}
  				},
  				orthofoto: {
  					options: {
  						variant: 'bmaporthofoto30cm',
  						format: 'jpeg'
  					}
  				}
  			}
  		},
  		NASAGIBS: {
  			url: '//map1.vis.earthdata.nasa.gov/wmts-webmerc/{variant}/default/{time}/{tilematrixset}{maxZoom}/{z}/{y}/{x}.{format}',
  			options: {
  				attribution:
  					'Imagery provided by services from the Global Imagery Browse Services (GIBS), operated by the NASA/GSFC/Earth Science Data and Information System ' +
  					'(<a href="https://earthdata.nasa.gov">ESDIS</a>) with funding provided by NASA/HQ.',
  				bounds: [[-85.0511287776, -179.999999975], [85.0511287776, 179.999999975]],
  				minZoom: 1,
  				maxZoom: 9,
  				format: 'jpg',
  				time: '',
  				tilematrixset: 'GoogleMapsCompatible_Level'
  			},
  			variants: {
  				ModisTerraTrueColorCR: 'MODIS_Terra_CorrectedReflectance_TrueColor',
  				ModisTerraBands367CR: 'MODIS_Terra_CorrectedReflectance_Bands367',
  				ViirsEarthAtNight2012: {
  					options: {
  						variant: 'VIIRS_CityLights_2012',
  						maxZoom: 8
  					}
  				},
  				ModisTerraLSTDay: {
  					options: {
  						variant: 'MODIS_Terra_Land_Surface_Temp_Day',
  						format: 'png',
  						maxZoom: 7,
  						opacity: 0.75
  					}
  				},
  				ModisTerraSnowCover: {
  					options: {
  						variant: 'MODIS_Terra_Snow_Cover',
  						format: 'png',
  						maxZoom: 8,
  						opacity: 0.75
  					}
  				},
  				ModisTerraAOD: {
  					options: {
  						variant: 'MODIS_Terra_Aerosol',
  						format: 'png',
  						maxZoom: 6,
  						opacity: 0.75
  					}
  				},
  				ModisTerraChlorophyll: {
  					options: {
  						variant: 'MODIS_Terra_Chlorophyll_A',
  						format: 'png',
  						maxZoom: 7,
  						opacity: 0.75
  					}
  				}
  			}
  		},
  		NLS: {
  			// NLS maps are copyright National library of Scotland.
  			// http://maps.nls.uk/projects/api/index.html
  			// Please contact NLS for anything other than non-commercial low volume usage
  			//
  			// Map sources: Ordnance Survey 1:1m to 1:63K, 1920s-1940s
  			//   z0-9  - 1:1m
  			//  z10-11 - quarter inch (1:253440)
  			//  z12-18 - one inch (1:63360)
  			url: '//nls-{s}.tileserver.com/nls/{z}/{x}/{y}.jpg',
  			options: {
  				attribution: '<a href="http://geo.nls.uk/maps/">National Library of Scotland Historic Maps</a>',
  				bounds: [[49.6, -12], [61.7, 3]],
  				minZoom: 1,
  				maxZoom: 18,
  				subdomains: '0123',
  			}
  		}
  	};
  
  	L.tileLayer.provider = function (provider, options) {
  		return new L.TileLayer.Provider(provider, options);
  	};
  
  	return L;
  }));
  