- Help Desk
- Electrical Resistivity Imaging Field Survey
- General questions about ERI
Is removing bad/noisy data acceptable?
Short Answer: Yes, it is acceptable if done procedurally—up to about 20% of the total with most data sets
Long Answer: Each measurement you take is an integrated response from the entire half or full-space. As such, the measurement carries information about the entire half or full-space. Data redundancy due to over-sampling ensures removal of some data is not fatal on the model's resolution.
Hand-picking data points to remove is not recommended as it is typically not a defensible practice. Also, massive data removal of a large number of data points will cause poor resolution in any area without data coverage.
When removing data, you will want to only remove ≤5% of data per iteration until you get to ≤10% RMS.
Related Material:
Learn how to remove misfit data using the Histogram Filtering Tool in EarthImager™ 2D.