197 3.3. Local Bias Analysis (Swath Plots) Global metrics can hide local biases. We generated Swath Plots (drift analysis) to verify local accuracy. Figure 1. Swath plots in Easting, Northing, and Elevation. Black: Real Data, Red: Kriging, Blue: GeaAI. Figure 1 illustrates the model's performance in the Northing direction. A significant high-grade shoot is observed around coordinate 7,004,500. Ordinary Kriging (red line) severely smooths this peak, underestimating the grade by over 50%. The Hybrid model (blue line) accurately tracks the peak, demonstrating its ability to resolve high-frequency spatial variation without overshooting in low-grade zones. Quantitative analysis of the Swath data shows that in the top 20% of high-grade zones, Kriging introduces a negative bias of -20.88 g/t, while GeaAI reduces this bias to -5.15 g/t, a 75.4% reduction in conditional bias.
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