The Human Impacts Database

A collection of useful numbers for quantifying the impacts of the human presence on Earth.

This quantity comes from a time series measurement and the most recent value (2010) is reported.


Value:		(7.47 ± 0.15) × 10¹¹ m² see this value in other units This is equivalent to... (7.47 ± 0.15) × 10⁵ km²
HuID:		39341
Relevant Year(s):		2010
Summary:		"Urban land" is defined as 'impervious surfaces' or artificial cover and structures such as pavement, concrete, brick, stone, and other man-made impenetrable cover types). See Table 3 and abstract of source for more information.
Method:		Value reported in the source to be 747.05 ± 1.05 thousand km² with the uncertainty corresponding to the 95% confidence interval. Value is obtained by classifying pixels in Landsat images from 1990 to 2010 with a resolution of ≈ 30 m. The total urban land area in 2010 as determined by satellite imaging.
Source:		Liu, X., Hu, G., Chen, Y., Li, X., Xu, X., Li, S., Pei, F., and Wang, S. High-resolution multi-temporal mapping of global urban land using Landsat images based on the Google Earth Engine Platform. 209, 227–239.. Remote Sensing of Environment (2018)
Dataset:		Global urban land area by region (Liu2018_table_3.csv) global resolution regional resolution
Trend:
Original Data License:		Elsevier User License
Added By:		gchure