| # Explanatory Case Cards | |
| ## Case 1: Population/Reporting Geography | |
| Observed public report counts track place population with log-scale correlation 0.641288. | |
| **What we can claim:** report density has a measurable relationship with population geography. | |
| **What we cannot claim:** population alone explains any individual report. | |
| ## Case 2: Major-Airport Proximity | |
| Median event-place centroid distance to a major scheduled airport is 13.277 miles, compared with 10.764 miles population-weighted across Census places. | |
| **What we can claim:** airport proximity is a measurable confounder for the public report surface. | |
| **What we cannot claim:** aircraft caused all or any specific reports without case-level evidence. | |
| ## Case 3: Missing Geocode Rows | |
| 17783 U.S. rows did not resolve to Census place centroids in this pass. | |
| **What we can claim:** skipped rows are explicitly counted and bucketed for recovery. | |
| **What we cannot claim:** the skipped rows would not affect any future recovered-location analysis. | |
| ## Top Places By Public Report Count | |
| - New York city, NY: 858 rows; population 8804190; 9.745 rows per 100k. | |
| - Phoenix city, AZ: 781 rows; population 1608139; 48.565 rows per 100k. | |
| - Seattle city, WA: 774 rows; population 737015; 105.018 rows per 100k. | |
| - Las Vegas city, NV: 658 rows; population 641903; 102.508 rows per 100k. | |
| - Portland city, OR: 580 rows; population 652503; 88.888 rows per 100k. | |
| - Los Angeles city, CA: 572 rows; population 3898747; 14.671 rows per 100k. | |
| - San Diego city, CA: 553 rows; population 1386932; 39.872 rows per 100k. | |
| - Chicago city, IL: 443 rows; population 2746388; 16.13 rows per 100k. | |