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| The slightly shorter polar radius of the elipsoid |
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| The slightly longer equatorial radius of the elipsoid |
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Definition
| Latitude on an ellipsoid. |
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| A sphere with the same surface area as specified reference elipsoid |
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Definition
| An oblate ellipsoid used to define the circumfrance of a spherical earth where hte length of meridians from equater to pole on the ellipsoid equals one quarter of the sperical circumfrance |
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Definition
| 1760 yards 5280 feet used for land distance in u.s. |
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| 1852 meters exactly about 1.15 statute miles, 1 minute of latitude measured along meridian |
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| The largest circle that can be drawn on the surface of the earth |
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| the meridian on the opposite side of the earth from the one being considered |
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| Area bounded by equal increments of latitude and longitude |
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| Geodetic Reference System of 1980 GRS 80 |
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Definition
| ellipsoid identical to wgs 84 ellipsoid |
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Definition
| 19 year cycle of the lunar phases |
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