Any of various French units of land measurement, especially one used in parts of Canada and the southern United States and equal to about 0.4 hectare (0.85 acre).

Earth's midsection bulges in relation to the measurement from pole-to-pole, and the catastrophic land displacement caused a small reduction in the bulge, making the planet more round.

Cadastral is according to the national laws and policies, to the land of the measurement attributes, cadastral quality of high and low will affect the land and subsequent related work.