"Toner (Stamen)","http://{s}.tile.stamen.com/toner/{z}/{x}/{y}.png",2,17,"Map tiles by Stamen Design, under CC BY 3.0. Data by OpenStreetMap, under ODbL." "Toner-LITE (Stamen)","http://{s}.tile.stamen.com/toner-lite/{z}/{x}/{y}.png",2,17,"Map tiles by Stamen Design, under CC BY 3.0. Data by OpenStreetMap, under ODbL." "OpenTopoMap","https://{s}.tile.opentopomap.org/{z}/{x}/{y}.png",2,15,"Kartendaten: © OpenStreetMap-Mitwirkende, SRTM | Kartendarstellung: © OpenTopoMap (CC-BY-SA)" "地理院地図(標準地図)","https://cyberjapandata.gsi.go.jp/xyz/std/{z}/{x}/{y}.png",5,18,"出典:国土地理院
The bathymetric contours are derived from those contained within the GEBCO Digital Atlas, published by the BODC on behalf of IOC and IHO (2003) (https://www.gebco.net)海上保安庁許可第292502号(水路業務法第25条に基づく類似刊行物)
Shoreline data is derived from: United States. National Imagery and Mapping Agency. ""https://www.gebco.netVector Map Level 0 (VMAP0)."" Bethesda, MD: Denver, CO: The Agency; USGS Information Services, 1997." "地理院地図(淡色地図)","https://cyberjapandata.gsi.go.jp/xyz/pale/{z}/{x}/{y}.png",5,18,"出典:国土地理院
Shoreline data is derived from: United States. National Imagery and Mapping Agency. ""Vector Map Level 0 (VMAP0)."" Bethesda, MD: Denver, CO: The Agency; USGS Information Services, 1997."