Changes

Physical geography helped establish the absolute location of towns, countries, landmasses and oceans. A typical way of identifying a given place's location is to express it as co-ordinates in [[latitude]] and [[longitude]]. Due to the curvature of the earth, the co-ordinates represent the projection of a location in three dimensions (i.e. on the surface of the earth) to two dimensions (i.e. a point on a map). As the earth is not perfectly spherical, the reliance upon a single projection for the entire world is unreliable and would result in distortions and inaccuracies (relative to the place's location on the earth). For this reason, there are many types of map projections, such as Lamberts Conformal Conic and Mercator projection. Similar to other measurements (such as length), a given geographic co-ordinate can be expressed in different ways, such as decimal degrees (e.g. 40.718119,-74.003906 for New York) or degrees, minutes and seconds (e.g. 40° 43' 5.2284", -74° 0' 14.0616").

Physical geography helped establish the absolute location of towns, countries, landmasses and oceans. A typical way of identifying a given place's location is to express it as co-ordinates in [[latitude]] and [[longitude]]. Due to the curvature of the earth, the co-ordinates represent the projection of a location in three dimensions (i.e. on the surface of the earth) to two dimensions (i.e. a point on a map). As the earth is not perfectly spherical, the reliance upon a single projection for the entire world is unreliable and would result in distortions and inaccuracies (relative to the place's location on the earth). For this reason, there are many types of map projections, such as Lamberts Conformal Conic and Mercator projection. Similar to other measurements (such as length), a given geographic co-ordinate can be expressed in different ways, such as decimal degrees (e.g. 40.718119,-74.003906 for New York) or degrees, minutes and seconds (e.g. 40° 43' 5.2284", -74° 0' 14.0616").

==Human geography==

==Human geography==