Drag countries anywhere to compare their true size, grade your projection's honesty, play a Mercator-lie guessing duel, find antipodes, draw great circles and measure in playful units. QGIS plugin.
education cartography gis qgis qgis-plugin projection spatial-analysis geography mercator map-projections great-circle tissot planx true-size antipode
-
Updated
Aug 2, 2026 - Python