Blaze@reddthat.com to Map Enthusiasts@sopuli.xyzEnglish · 6 months agoTimezone changes between 1923 and 2023files.catbox.moeimagemessage-square45fedilinkarrow-up1211arrow-down15
arrow-up1206arrow-down1imageTimezone changes between 1923 and 2023files.catbox.moeBlaze@reddthat.com to Map Enthusiasts@sopuli.xyzEnglish · 6 months agomessage-square45fedilink
minus-squareDarkCloud@lemmy.worldlinkfedilinkarrow-up11arrow-down1·6 months agoTechnically every 30 metres there should be a 1 second time zone adjustment.
minus-squareSuccessful_Try543@feddit.delinkfedilinkEnglisharrow-up11arrow-down1·edit-26 months agoThen we’d be back in pre-railway era.
minus-squarederpgonlinkfedilinkarrow-up4arrow-down1·6 months agoActually every 463 meters. 40 075km is circumference of Earth. There are 24x60x60 seconds in a day. 40 075×1 000÷(24×60 ×60) =~ 463.8
minus-squareCaspase8@aussie.zonelinkfedilinkarrow-up8·6 months agoWouldn’t it depend on latitude? It would be much less than 463 metres at the latitudes of Europe
minus-squareSuccessful_Try543@feddit.delinkfedilinkEnglisharrow-up1·edit-26 months agoYes, distance of 1" on equator (463.8 m) × cosine of latitude longitude. This means approximately 350 m in Rome, 285,6 m in Berlin and 232 m in Helsinki. In reality a bit less, as I didn’t take the ellipsoid shape of the globe into account.
Technically every 30 metres there should be a 1 second time zone adjustment.
Then we’d be back in pre-railway era.
Actually every 463 meters.
40 075km is circumference of Earth. There are 24x60x60 seconds in a day.
40 075×1 000÷(24×60 ×60) =~ 463.8
Wouldn’t it depend on latitude? It would be much less than 463 metres at the latitudes of Europe
Yes, distance of 1" on equator (463.8 m) × cosine of latitude
longitude. This means approximately 350 m in Rome, 285,6 m in Berlin and 232 m in Helsinki. In reality a bit less, as I didn’t take the ellipsoid shape of the globe into account.