Mercator Projection Map

Add countries onto the Mercator projection and watch in real time how their shape and size change.

Select map projection:

Add country to compare:

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Map layers

Tissot's indicatrices

Equal-sized circles on the globe. Their distortion on the map instantly reveals how the projection alters area and shape.

Area-distortion heatmap

A continuous gradient across the whole map: the redder an area, the more the projection inflates its size relative to reality.

Day & night

Draws the day/night boundary (terminator) — a great circle that every projection bends differently. Drag the slider to change the time.

Antipodes

Overlays each selected country's outline at its antipode (the opposite side of the globe). Unavailable on the globe view.

Tip: You can drag selected countries on the map to directly compare their sizes at different latitudes!