Table 1 Field-Level Extraction Accuracy (n = 200; LLM = o3).

From: Structured dataset of reported cloud seeding activities in the United States (2000–2025) using an LLM

Field

Accuracy (%)

95% Confidence Interval

Project

100.00%

[97.00%, 100.00%]

Year

100.00%

[97.00%, 100.00%]

Season

100.00%

[97.00%, 100.00%]

State

99.50%

[96.50%, 100.00%]

Operator Affiliation

98.50%

[95.50%, 100.00%]

Agent

98.50%

[95.50%, 100.00%]

Apparatus

97.00%

[94.00%, 100.00%]

Purpose

99.50%

[96.50%, 100.00%]

Target Area

97.50%

[94.50%, 100.00%]

Control Area

92.00%

[89.00%, 95.00%]

Start Date

98.50%

[95.50%, 100.00%]

End Date

99.50%

[96.50%, 100.00%]

Overall Average

98.38%

[95.38%, 100.00%]

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