| Parameter Name |
Symbol |
Category |
| Angular
Power Spectral Density Function |
APSDF |
Spatial |
| Areal
Material Ratio |
Smr(c) |
Functional |
| Autocorrelation
Function |
ACF |
Spatial |
| Autocorrelation
Length |
Sal |
Spatial |
| Average
Maximum Height of the Surface |
Rz |
Legacy |
| Average
Maximum Peak Height |
Rpm |
Legacy |
| Average
Maximum Profile Height Along X, Y |
Stylus
(X,Y) Rz |
2D Stylus |
| Average
Maximum Valley Depth |
Rvm |
Legacy |
| Average
Roughness |
Sa |
Height |
| Average
Roughness Along X, Y |
Stylus
(X,Y) Ra |
2D Stylus |
| Core
Material Volume |
Vmc(p,q) |
Functional |
| Core
Roughness Along X, Y |
Stylus
(X,Y) Rk |
2D Stylus |
| Core
Roughness Depth |
Sk |
Functional |
| Core
Void Volume |
Vvc(p,q) |
Functional |
| Dale
Void Volume |
Vvv(p) |
Functional |
| Developed
Interfacial Area Ratio |
Sdr |
Hybrid |
| Inverse
Areal Material Ratio |
Sdc(mr) |
Functional |
| Kurtosis |
Sku |
Height |
| Material
Ratio |
mr |
Functional |
| Material
Volume |
Vm(mr) |
Functional |
| Maximum
Height of Surface |
Sz |
Height |
| Maximum
Peak Height |
Sp |
Height |
| Maximum
Profile Height Along X, Y |
Stylus
(X,Y) Rt |
2D Stylus |
| Maximum
Valley Depth |
Sv |
Height |
| Mean
Profile Spacing Along X,Y |
Stylus
(X,Y) Rsm |
2D Stylus |
| Mean
Summit Curvature |
Ssc |
Hybrid |
| Normalized
Surface Volume |
NormVolume |
Legacy |
| Peak
Density Along X,Y |
Stylus
(X,Y) Pc |
2D Stylus |
| Peak
Extreme Height |
Sxp
(p,q) |
Functional |
| Peak
Material Portion |
SMr1 |
Functional |
| Peak
Material Volume |
Vmp(p) |
Functional |
| Peak
Valley Portion |
SMr2 |
Functional |
| Reduced
Peak Height |
Spk |
Functional |
| Reduced
Peak Height Along X,Y |
Stylus
(X,Y) Rpk |
2D Stylus |
| Reduced
Peak Height to Core Ratio |
Spk/Sk |
Functional |
| Reduced
Peak Height to Reduced Valley Depth Ratio |
Spk/Svk |
Functional |
| Reduced
Valley Depth |
Svk |
Functional |
| Reduced
Valley Depth Along X, Y |
Stylus
(X,Y) Rvk |
2D Stylus |
| Reduced
Valley Depth to Core Ratio |
Svk/Sk |
Functional |
| Root
Mean Square Profile Wavelength Along (X, Y) |
Stylus
(X,Y) λq |
2D Stylus |
| Root
Mean Square Roughness |
Sq |
Height |
| Root
Mean Square Slope Along X,Y |
Stylus
(X,Y) Δq |
2D Stylus |
| Root
Mean Square Slope in X,Y |
Slope
Rq (X,Y) |
Legacy |
| Root
Mean Square Surface Slope |
Sdq |
Hybrid |
| Skewness |
Ssk |
Height |
| Stylus Δq
Ratio |
Stylus
X Δq/Stylus Y Δq |
2D Stylus |
| Stylus
λq Ratio |
Stylus
X λq/Stylus Yλq |
2D Stylus |
| Stylus
Pc Ratio |
Stylus
X Pc/ Stylus Y Pc |
2D Stylus |
| Stylus
Ra Ratio |
Stylus
X Ra/Stylus Y Ra |
2D Stylus |
| Stylus
Rz Ratio |
Stylus
X Rz/Stylus Y Rz |
2D Stylus |
| Summit
Density |
Sds |
Hybrid |
| Surface
Area Index |
SAI |
Legacy |
| Texture
Aspect Ratio |
Str |
Spatial |
| Texture
Direction |
Std |
Spatial |
| Void
Volume |
Vv(mr) |
Functional |