Table 7 Pixel sample validation results of different continents.

From: The first urban open space product of global 169 megacities using remote sensing and geospatial data

Continent

O.A.(%)

Kappa(%)

Oceania

88.26

84.67

Asia

78.27

70.64

Europe

78.32

71.75

Africa

64.16

55.18

North America

85.65

81.75

South America

81.46

74.99