Soubor:Spherical with grid.svgDescriptionSpherical with grid.svg Spherical coordinate system Date 12/03/08 Source Own work Author Andeggs Permission (Reusing this file) Attribution
Soubor:CK12 Earth Science.pdfhttp://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Brosen_windrose.svg/600pxBrosen_windrose.svg.png, License: GNU Free Documentation)
A compass needle aligns