Contouring – Advanced Issues

EnviroInsite Training Workshop

March 2013

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Interpolating measured values onto 1-D Grid

Kriging Range in 1-D Interpolation

EnviroInsite Training

measurement

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Kriging Range in 2D Interpolation

EnviroInsite Training

Grid Tips

Advanced Issues in Contouring

• Use smallest number of rows / columns that provides reasonable result

• Start with small number of rows / columns and increase for final plot

• Change grid bounds (horizontal and vertical) to slice through contour

Kriging Tips

Advanced Issues in Contouring

• Spherical model typically works best

• Increasing a_max / a_minsmooths result

• For contaminant plumes –set angle along axis and increase a_max relative to a_min

• Generally don’t change sill / nugget

Other Contouring Options

Advanced Issues in Contouring

• Calculate volume within each contour shell (only for 3d)

• Log Transform – good for contaminant data

• Manual Label Placement

Advanced Issues in Contouring

Hands-on Exercise