Selecting Countries & Regions
TrueSize lets you combine modern countries, sub‑national regions (like US states), continents, and historical empires from dozens of curated time periods. With 270+ countries, 56,000+ subdivisions, and 6 continents, TrueSize offers the most comprehensive geographic comparison database available.
How to Select
- Search by name, ISO code, or browse the time‑period dropdown
- Click to add modern countries, states/provinces, continents, or historical territories
- Choose from 60+ eras (ancient civilizations to the early 21st century)
- Access 56,000+ regional subdivisions including US states, Canadian provinces, German Länder, Russian oblasts, and more
Selecting a historical empire from a time period
Load All from a Time Period
Use the "All" button to add every top-level country or empire available for the currently selected time period in one click. Note: The "All" button excludes continents and automatically hides country labels for better performance.
Loading all regions from a selected historical year
Load Countries and Regions with Their Subdivisions
Choosing e.g. "United States (all 50 states)" loads the US as individual state polygons instead of a single outline. Similar grouped sets are available for all other countries where subdivision data is available. You can drill down many levels—states, provinces, counties, and even towns and cities.
Loading Your Own Data
Have specialized or higher‑resolution data? Import your own GeoJSON or TopoJSON to supplement or replace built‑in layers.
Importing a custom GeoJSON file
After repositioning or rotating, export the modified geometry as a new GeoJSON. 
Notes:
- Custom data import/export is currently supported on the 2D map only (not on the 3D globe yet).
- Export option is limited by 30 built‑in countries; your own imported shapes are not restricted the same way.
Next: Learn how to move & compare the regions you selected.