10 attribute fields, profiled from the June 2021 vintage.
Columns in Carroll County
| Field | Type | Filled | Distinct | Example values |
|---|---|---|---|---|
| parcel_id | OFTString | 13.2k | ||
| pid | OFTString | 13.1k | 07-09-07-203-002, 08-07-35-402-002, 01-05-01-200-001 | |
| p_owner | OFTString | 9.9k | MT CARROLL LUMBER MART INC, MCDANIEL KEVIN, SCHMIDECAMP JAMES D & JANET K TRUSTS | |
| ppid | OFTString | 13.1k | 07-09-07-203-002, 08-07-35-402-002, 01-05-01-200-001 | |
| owner | OFTString | 9.8k | MT CARROLL LUMBER MART INC, MCDANIEL KEVIN, SCHMIDECAMP JAMES D JANET K TRUSTS | |
| mail_addr | OFTString | 6.5k | ,USA, NEHRKORN CRAIG W 4878 A IL ROUTE 73 LANARK,IL61046-0000USA, 39W847 DAIRYHERD LANE ST CHARLES,IL60175-0000USA | |
| situs | OFTString | 11.2k | 702-704 S EAST ST MT CARROLL,IL61053-0000 Map this address, 6409 RIVERVIEW RD THOMSON,IL61285-0000 Map this address, SHANNON RT SHANNON,IL61078-0000 | |
| legal | OFTString | 12.9k | LOT 3 4 DERRER'S EAST COMMERCIAL SUB, LOT 1, 2 4 BLK 1 CLEMENTS LAKE VIEW SUB DIV., 4.06 AC IN SE NE S1 T25 R6 SPLIT (2002) | |
| id | OFTInteger | 13.9k | 1, 2, 3 | |
| centroid | OFTString | 13.9k |
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.