GAA	Area averaged Gaussian curvature
MAA	Area averaged Mean curvature
GLN	L2 norm of the Gaussian curvature
MLN	L2 norm of the Mean curvature
	$$\begin{array}{c}\mathit{GAA}=\frac{{\sum }_{\text{all}\text{elements}}{K}_j{S}_j}{{\sum }_{\text{all}\text{elements}}{S}_j}\\ \mathit{MAA}=\frac{{\sum }_{\text{all}\text{elements}}{M}_j{S}_j}{{\sum }_{\text{all}\text{elements}}{S}_j}\\ \mathit{GLN}=\frac{1}{4\pi }\sqrt{\sum _{\text{all}\text{elements}}{S}_j·\sum _{\text{all}\text{elements}}\left(K_j^2{S}_j\right)}\\ \mathit{MLN}=\frac{1}{4\pi }\sqrt{\sum _{\text{all}\text{elements}}\left(M_j^2{S}_j\right)}\end{array}$$