required_spacing builtin

required_spacing(curve, *, column='P90', threshold=0.15)

Largest data spacing whose uncertainty still meets a threshold.

Parameters:

Name	Type	Description	Default
curve	Table	Result of uncertainty_curve, or any table with spacing and column, sorted by spacing.	required
column	str	Uncertainty column of curve.	'P90'
threshold	float	Acceptable uncertainty.	0.15

Returns:

Type	Description
float	Spacing interpolated linearly between the last row at or below threshold and the first above it; NaN when the first row is already above. When the curve never rises above, the largest spacing, with a warning that the required spacing lies beyond the tested range.

used in

• Drill-hole spacing from virtual grids
• Drill-hole spacing from a learning curve