Map scale: how to convert centimetres to kilometres correctly
Learn to read a 1:n scale, convert cm to km and solve proportions for ground distances, map measurements and unknown scales.
Read articleGeography
Territory, population, economy, nature, maps and spatial relationships explained through everyday examples.
7articles
HDI or GDP per capita: why similar incomes do not mean equal development
Learn why average output, education and life expectancy tell different stories. Compare the measures through two fictional countries.
Read article
Why Does All of China Use UTC+8? How One Time Zone Shifts Solar Time in Xinjiang
China uses Beijing Time (UTC+8) nationwide. Learn the history of its former five-zone system, how Xinjiang Time fits in, and why solar noon in Kashgar can fall close to 3 p.m.
Read article
Why Is North at the Top of Maps? How a Convention Became the Standard — and Why It Could Be Different
North-up is a cartographic convention, not a rule of the planet. See how east, south, and north have all occupied the top and why one standard prevailed.
Read article
Why Acre Uses UTC−5: From the 2008 Change to the 2010 Referendum and 2013 Law
Learn why Acre is two hours behind Brasília and how the 2008 change, the 2010 referendum and Law 12,876/2013 shaped its current time zone.
Read article
Why Does India Use UTC+5:30 and Nepal UTC+5:45? Longitude, History, and Borders
Learn why India and Nepal use half-hour and 45-minute offsets, and how longitude, history, borders, and national decisions shape civil time.
Read article
Equal Earth vs Mercator: what the UN resolution changes on maps — and what it does not
Understand why the UN now encourages equal-area maps such as Equal Earth, and why Mercator remains useful for navigation and digital mapping.
Read article