What is the maximum possible social distance?

With official guidance due to coronavirus being a social distance of two metres, what is the maximum possible social distance on Earth? In this video I use high resolution geospatial data to find out!

As I say in the video, this calculation is definitely an approximation at parts, and I've done my best to be realistic with the errors. At the end of the day though the single biggest factors are the packing efficiency and the effect of orography - I don't doubt that some sub-grid (in my data at least) processes might produce effects of a few millimetres, and if people would like to calculate these themselves then please do so and let me know on social media. If you're interested in the effects of domestic houses then please see the pinned comment!

Notes:
(1) https://www.worldometers.info/world-population/
(2) Note that this was retrieved on 23/3/2020, before I edited this video!
(3) Danielson, J.J., and Gesch, D.B., 2011,
Global multi-resolution terrain elevation data 2010 (GMTED2010):
U.S. Geological Survey Open-File Report 2011-1073, 26 p., retrieved from http://www.temis.nl/data/gmted2010/
(4) Note that the original dataset does actually have an even higher resolution of 15"! But for ease of computation I worked with the highest available resolution of .netcdf file, which was 225"
(5) See, e.g. https://mathworld.wolfram.com/CirclePacking.html
(6) https://www.travelweek.ca/news/exactly-many-planes-world-today/ NB not original source, which I couldn't seem to find
(7) https://en.wikipedia.org/wiki/List_of_large_aircraft
(8) Taken from table 2.3 https://www.maritime-executive.com/article/the-global-fleet-revealed
(9) NB missing from video! https://www.skyscrapercenter.com/

In this video I calculate the maximum possible social distance on Earth due to the coronavirus, accounting for elevation/orography, packing efficiency, and the world population. Ish.

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Видео What is the maximum possible social distance? канала Simon Clark