Geo-Time Map
One map, three things: find same-latitude / same-longitude cities, see the year-by-year history of any place, and explore its climate and population. Free, bilingual (English / Chinese), no sign-up.
一张地图，三件事：找同纬度/同经度的城市、看一个地方逐年的历史归属、了解它的气候与人口。免费、中英双语、无需登录。
▶ Open the map 打开地图What it does
- Same-latitude / same-longitude cities — pick a place and the map highlights cities on its parallel (similar climate) or meridian (similar time zone), with their country and population.
- Year-by-year history — drag the timeline to see which power ruled that land from antiquity to today; China proper is year-precise and shows the ruler of the year and the contemporary place name.
- People & events of the year — notable people born/died at that place in the selected year, plus world events that year; names link to Wikipedia / Baidu Baike.
- Geography & society — climate type, mean temperature and precipitation, country population, languages, capital, visa-free developed countries, GDP per capita and world rank.
- Multiple base maps — ESRI satellite, OpenFreeMap streets, terrain, and a 3D globe; one-click English / Chinese.
How to use
- Click
⊕(bottom-left) to enter pick mode, then click anywhere on the map; or use the search box (top-right). - The right panel shows coordinates, climate, country data and same-latitude / same-longitude cities.
- Open the History tab and drag the timeline for year-by-year history.
Who it's for
Students and parents, geography and history enthusiasts, teachers preparing lessons, travelers and cross-cultural comparison, and anyone curious "which place on the other side of the world shares my hometown's latitude".
FAQ
What are same-latitude / same-longitude cities?
Same-latitude cities sit on the same horizontal line and share a similar climate; same-longitude cities sit on the same vertical line and share a time zone.
How do I see which power ruled a place in a year?
Click the place → History tab → drag the timeline. China proper is year-precise and shows the ruler and contemporary place name.
Is it free?
Completely free, no login, no install; English & Chinese.
Data sources?
GeoNames, historical-basemaps, Open-Meteo, the World Bank, OpenStreetMap, Wikipedia / Wikidata, ESRI, OpenFreeMap, OpenTopoMap.
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