https://xkcd.com/2807 I like how the Titanic ended up in the Caspian Sea
other discussions
Title text: Positive vibes/longitudes only
Transcript
[There is a map of the world with positive longitudes and negative longitudes overlapping. Caption above the map:]
Bad Map Projection #152:
Longitude=ABS(Longitude)
Whoops, made all longitudes positive
[The land masses are represented in white, and the oceans in light grey. Some capital cities, countries and geographical features are labeled.]
[Near Siberia, among the other city names, is indicated:]
Franklin's very lost expedition
For non mathematicians, ABS() returns the absolute (i.e. positive) value of a number, e.g. abs(5) = 5 = abs(-5)