茲製等距環以知各地離此之距離。 I managed to make maps to help me get an idea of how far places are from me. 讀者應能應用至其所居之地方。 I'm sure the reader can apply this to where s/he lives.
World with equidistant small circles 2000 km. apart, originating in Taiwan (or Paraguay), map centered on North America, Taiwan (4 Kb each), and Europe:
Program I used on GNU/Linux to make the maps. Raup's gallery does better.
| Km. | 線狀地物 Elongated geographic feature |
|---|---|
| 3180 | 馬六甲海峽中央線 Strait of Malacca axis |
| 3700 | 印尼之爪哇、帝汶、阿魯 Java, Timor, Aru, Indonesia |
| 5000 | 印度半島西岸 Indian Peninsula west coast |
| 8200 | 紅海 Red Sea, Africa / Asia |
| 9000 | 紐西蘭西岸 New Zealand west coast (except Auckland Peninsula) |
| 10000 | 已半球 Halfway around the world, 南極洲之威爾克斯地海岸線 Wilkes Land coast, Antarctica |
| 12000- 12600 |
非洲西岸 Africa west coast: Cape of Good Hope to Nigeria |
| 12300 | Lake Erie axis, USA / Canada |
| 12650 | 紐約長島軸線 Long Island axis, New York |
| 12900 | Tennessee / N. Carolina boundary |
| 12950 | 德州海岸線 Texas coast (except south extreme) |
| 13900 | 非洲西岸 Africa west coast: Gambia to Sierra Leone |
| 14000 | 南極洲之科茨地海岸線 Antarctic coast from ~ 10 to 35 west longitude |
(原始碼 Source code.) (To compute instead distances from Paraguay, subtract the above number from 20000.) 與之交叉有 Perpendicular to these are 經台之大圓 great circles through Taiwan
http://en.wikipedia.org/wiki/Extreme_points_of_Earth#Along_any_great_circle
尋福建哪理最近我， 竟然先遇台灣所屬之烏坵嶼。 We find the closest place in China to me. It turns out first we meet Taiwan controlled Wuqiu Islands. China is 離華 170 km. away. (原始碼 Source code.) (We also thus find the farthest place in China from (my antipode in) Paraguay.)
Last modified: 2015-09-14 15:48:44 +0800