 "geolocation, location, maps")
One of the great accomplishments of the 21st century is the ability to determine locations very accurately. A smartphone can easily geo-locate itself inside a square with 3.5 metres or less on each side, using open location codes (“plus codes”).
Plus codes simplify the representation of a given spot, using extended longitude and latitude coordinates with subdivisions of minutes and seconds. Plus codes use a Base 20 number system to convert the Lat-Long readings into shorter formats.
Geometers can also add the international height reference frame to adjust differences in sea-levels with baseline “zero-height”.
The maths is not conceptually hard. The accuracy
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