Editing Mercator projection (section)

===Transverse Mercator===
{{Main|Transverse Mercator projection }}
A transverse Mercator projection tilts the cylinder axis so that it is perpendicular to Earth's axis. The tangent standard line then coincides with a meridian and its opposite meridian, giving a constant [[scale factor]] along those meridians and making the projection useful for mapping regions that are predominately north–south in extent. In its more complex ellipsoidal form, most national grid systems around the world use the transverse Mercator, as does the [[Universal Transverse Mercator coordinate system]].