Spatial Math: Analyzing Coordinates:High Secondary
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Summary: In this lesson, you will use Geographic Information Systems (GIS) to study coordinates.
Objectives: Develop practical skills in using coordinates within a GIS framework, addressing, understanding latitude and longitude and their relationship to coordinates, understand precision and coordinates, and use different units of measurement.
Coordinates are positions in a two-dimensional plane or a three-dimensional surface that help us determine where things are on the Earth’s surface. Coordinate systems have an origin and a set of axes. Everything in the coordinate system is referenced off of that coordinate system. A street address is one type of coordinate. In a metropolitan area, each address is referenced off of a point of origin where the addresses begin. This could be a real place (such as 1st Avenue and Main Street) or an imaginary one (such as a point 1 mile off of the western shore of a city). At the origin, addresses could start at zero, or they may start at 100, or some other number.
Revised 21 May 2010.