4 ms·
The longest straight line in Great Britain (without crossing a public road)
- szszrk 2y agoThis short film he mentions (of the previous "longest" line hike) is really a lot of fun: https://www.youtube.com/watch?v=64wZHZSxCZM https://www.youtube.com/watch?v=64wZHZSxCZM
- gcr 2y agoWhat does “straight line” mean? It looks like the curvature of the earth could be significant at this scale. Does it mean that the compass’s bearing never changes? That wouldn’t produce a perfect sphere chord though.
- defrost 2y agoIn this context https://www.ordnancesurvey.co.uk/blog/gbs-longest-linear-walk-without-crossing-a-road https://www.ordnancesurvey.co.uk/blog/gbs-longest-linear-wal... it means "ruler straight line on standard UK ordance survey map projection" ie. a straight line on a specifically parameterised Modified Transverse Mercator projection. I'll leave the fun of working backwards from that to the reader, fun adventures include "Do they use WGS84 or do they still use whatever reference ellipsoid was current in the UK just after the end of WWII?"
- JosephRedfern 2y agoIt'd be interesting to learn more about how this line was identified - was it by eye, or is there some neat analysis that was (or could be) performed to find it?
- blutack 2y agoPart 2 goes into the methodology - it's some neat analysis! http://www.statsmapsnpix.com/2023/04/the-longest-line-part-2.html http://www.statsmapsnpix.com/2023/04/the-longest-line-part-2...
- vicarrion 2y agoSemi related: hiking across England in a straight line https://youtube.com/playlist?list=PL_japiE6QKWrN8t0-oUKOoMGxkcj76bcN https://youtube.com/playlist?list=PL_japiE6QKWrN8t0-oUKOoMGx...