6 attribute fields, profiled from the October 2022 vintage.
Columns in Chester County
| Field | Type | Filled | Distinct | Example values |
|---|---|---|---|---|
| parcel_id | OFTString | 9.9k | 012001 00100, 012001 00200, 012001 00200 | |
| pid | OFTString | 9.8k | 001 00100 00005001, 001 00200 00005001, 001 00200 00005001 | |
| owner | OFTString | 8.4k | PERKINS CHARLES LEE, BARCLAY WILLIAM J, BARCLAY WILLIAM J | |
| mail_addr | OFTString | 7.3k | 1300 ROUNDTREE LANE BEECH BLUFF TN 38313, P O BOX 219 HENDERSON TN 38340, 225 RECORD DRIVE HENDERSON TN 38340 | |
| situs | OFTString | 7.5k | ISLAND ROAD, ISLAND ROAD, ISLAND ROAD | |
| gislink | OFTString | 9.9k | 012001 00100, 012001 00200, 012001 00200 |
Why this differs from the next county over
There is no national parcel schema. Every assessor's office built its own, usually decades ago, usually inside whatever CAMA system it bought at the time. One county's owner column is OWNER_NAME, the next one's is own1, and a third splits it across four fields. Shapefile's ten-character DBF limit truncated a generation of them into things like TOTLNDVAL.
Nothing here is renamed or remapped. The columns above are exactly what is in the file, because a normalisation layer that quietly guesses wrong is worse than no normalisation at all — and every guess it makes is one you cannot audit.
The Filled column is the share of rows with a real value. Placeholder text such as n/a counts as empty; a column that is 100% present but 90% placeholder is a column that will disappoint you, and the profiler treats it accordingly.