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5 themes of geo
| Term | Definition |
|---|---|
| Reference map | shows the location of the geographic areas for which census data are tabulated and disseminated. The maps display the boundaries, names and unique identifiers of standard geographic areas |
| thematic map | a type of map or chart especially designed to show a particular theme connected with a specific geographic area. |
| GPS | GPS is short for global positioning system. GPS devices tell you your exact longitude and latitude (it gets the information from orbiting satellites). |
| GIS | a computerized data management system used to capture, store, manage, retrieve, analyze, and display spatial information. |
| distance scale | The scale of a map is the ratio of a distance on the map to the corresponding distance on the ground. This simple concept is complicated by the curvature of the Earth's surface, which forces scale to vary across a map. |
| directional indicator | component of the average directional index (ADX) that is used to measure the presence of a downtrend. |
| inset map | a small picture, map, etc., inserted within the border of a larger one. a piece of cloth or other material set into a garment, |
| legend | a traditional story sometimes popularly regarded as historical but unauthenticated. |
| latitude (parallels) | Latitude is an angle which ranges from 0° at the Equator to 90° (North or South) at the poles. Lines of constant latitude, or parallels, run east–west as circles parallel to the equator. Latitude is used together with longitude to specify the precise loca |
| longitude (meridians) | Longitude is the angular distance east or west from the north-south line that passes through Greenwich, England, to a particular location. Greenwich, England has a longitude of zero degrees. The farther east or west of Greenwich you are, the greater your |
| equator | The equator is an imaginary circle around the earth, halfway between the north and south poles. |
| prime meridian | The prime meridian (0 degrees longitude) is the meridian that passes through Greenwich, England. |
| northern hemisphere | The Northern Hemisphere is the half of the Earth that is north of the equator. |
| southern hemisphere | The Southern Hemisphere is the half of the Earth that is south of the equator |
| eastern hemisphere | The Eastern Hemisphere consists of Africa, Asia, Australia, and Europe |
| western hemisphere | The Western Hemisphere is another name for the Americas (or the New World). |
| continents | The land mass on Earth is divided into continents. The seven current continents are Africa, Antarctica, Asia, Australia, Europe, North America, and South America. |
| map grid | Grid lines on maps define the coordinate system, and are numbered to provide a unique reference to features. Grid systems vary, but the most common is a square grid with grid lines intersecting each other at right angles and numbered sequentially from the |
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