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Basic Concepts 1.1
AP HuG
| Term | Definition |
|---|---|
| Map | A two-dimensional or flat-scaled model of Earth's surface, or a portion of it |
| Cartography | The science of mapmaking |
| Map Scale | Refers to the relationship of a feature's size on a map to it's actual size on Earth |
| Ratio or Fraction | Shows the numerical ratio between distances on the map and Earth's surface |
| Written Scale | Describes the relationship between map and Earth distances in words |
| Graphic Scale | Usually consists of a bar line marked to show distance on Earth's surface |
| Projection | The scientific method of transferring locations on Earth's surface to a flat map |
| Meridian | An arc drawn between the North and South poles |
| Longitude | A numbering system on a map |
| Prime Meridian | 0 degrees longitude, passes through the Royal Conservatory at Greenwich, England |
| Parallel | A circle drawn around the globe parallel to the equator and at right angles to the meridians. |
| Latitude | The numbering system to indicate the location of a parallel |
| Greenwich Mean Time | Also known as Universal Time, is the time at the prime meridian, is also the master reference time for all points on Earth |
| International Date Line | Follows 180 degree longitude, when you cross it eastward toward America, you move the clock back 24 hours or one full day |
| Geographic Information Science | The development and analysis of data about Earth acquired through satellite and other electronic information technologies |
| Remote Sensing | The acquisition of data about Earth's surface from a satellite orbiting Earth or from other long-distance methods |
| Geographic Information System | A computer system that captures, stores, queries, analyzes, and displays geographic data |