This line shapefile depicts tropical circles, polar circles, the International Date Line and the equator as geographic lines. Same as 50 million geographic lines. These data are represented at 1:10,000,000 scale. This layer is part of the Natural Earth Collection (v.2.0.0). Natural Earth is a public domain map dataset available at 1:10m, 1:50m, and 1:110 million scales. Featuring tightly integrated vector and raster data, with Natural Earth you can make a variety of visually pleasing, well-crafted maps with cartography or GIS software. Kelso, N.V. and Patterson, T. (2012). World Geographic Lines, 1:10 million, (2012). Made with Natural Earth, online at http://www.naturalearthdata.com. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.