GIS 위상관계(http://www.ncgia.ucsb.edu/education/curricula/giscc/units/u013/u013_f.html_

Plane Coordinate Systems

1. A Point Described by Cartesian Coordinates in a Plane

2. A Line Defined by Two Points in a Plane

3. Distance Between Two points (Line Length) from the formula of Pythagoras

4. A Point Described by Polar Coordinates in a Plane

Conversion of Polar to Cartesian Coordinates in a Plane

1.2. Three-Dimensional Systems

A Point Described by Three-Dimensional Cartesian Coordinates

A Point Described by Three-Dimensional Polar Coordinates

Conversion of Three-Dimensional Polar to Three Dimensional Cartesian Coordinates