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| | The World Factbook 2004 - Notes and Definitions |
 | | This entry gives the total number of airports with paved runways (concrete or asphalt surfaces). |
 | | For airports with more than one runway, only the longest runway is included according to the following five groups - (1) over 3,047 m, (2) 2,438 to 3,047 m, (3) 1,524 to 2,437 m, (4) 914 to 1,523 m, and (5) under 914 m. |
 | | This entry gives the total number of airports with unpaved runways (grass, dirt, sand, or gravel surfaces). |
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