報案使用的座標系 - 戶外用品
By Bethany
at 2022-06-07T12:11
at 2022-06-07T12:11
Table of Contents
經緯度座標有分「度分秒」和「浮點數」
在報案時要採用哪個座標系呢?需要報多少精確度?
例如玉山主峰
- 度分秒: 23°28'12"N 120°57'27"E
- 浮點數: 23.47006, 120.95747
iPhone「指南針」一打開就會顯示目前定位經緯度座標,但是為「度分秒」,
該精確度為 1/3600 度 (也就是 1 秒),也就是 0.00028 度 (精確度為小數後3位)
使用 Google Maps 或 Apple Maps 會提供浮點座標,精確度較高,
但是經緯度座標的功能藏很深,而且繪製地圖、撈API數據會比較耗電。
報案應該直接使用「度分秒」就可以了,對吧?
--
在報案時要採用哪個座標系呢?需要報多少精確度?
例如玉山主峰
- 度分秒: 23°28'12"N 120°57'27"E
- 浮點數: 23.47006, 120.95747
iPhone「指南針」一打開就會顯示目前定位經緯度座標,但是為「度分秒」,
該精確度為 1/3600 度 (也就是 1 秒),也就是 0.00028 度 (精確度為小數後3位)
使用 Google Maps 或 Apple Maps 會提供浮點座標,精確度較高,
但是經緯度座標的功能藏很深,而且繪製地圖、撈API數據會比較耗電。
報案應該直接使用「度分秒」就可以了,對吧?
--
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戶外用品
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