Atlanta is about 1.4 times smaller than Scottsdale.

Scottsdale is approximately 477 sq km, while Atlanta (map shows its 114 named neighbourhoods; the area covers the whole city) is approximately 350 sq km, making Atlanta 73.54% the size of Scottsdale.
Tip: This to-scale comparison of Scottsdale vs. Atlanta uses the Mercator projection, which distorts the size of regions near the poles.
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