43 attribute fields, profiled from the May 2023 vintage.
Columns in Nassau County
| Field | Type | Filled | Distinct | Example values |
|---|---|---|---|---|
| PARCEL_ID | OFTString | 50.0k | 21.-88-303, 21.-88-313.D, 21.-38-213 | |
| SITUS | OFTString | 50.0k | 10 HARBOR HILL RD, 120 HARBOR HILL RD, 25 LA MARCOS AVE | |
| ADDR_NUMBE | OFTString | 4.3k | 10, 120, 25 | |
| STREET_PRE | OFTString | 30 | HARBOR, HARBOR, LA | |
| STREET_NAM | OFTString | 4.9k | HILL, HILL, MARCOS | |
| STREET_SUF | OFTString | 8 | E, E, E | |
| STREET_TYP | OFTString | 69 | Rd, Rd, Ave | |
| SITUS_CITY | OFTString | 59 | NEW HYDE PARK, NEW HYDE PARK, GLEN COVE | |
| SITUS_ZIP | OFTString | 64 | 11042, 11042, 11542 | |
| ADDR_SEC_U | OFTString | 471 | UNIT 107, UNIT 16, BLD 8 | |
| OWNER | OFTString | 50.0k | CHOPIN NESTOR, CARRERA MICHAEL J & E M, GRAZIOSI ARMANDO & CONCETTA | |
| LAND_USE_C | OFTString | 142 | 210, 220, 210 | |
| LAND_US_01 | OFTString | 5 | Residential, Residential, Residential | |
| LAND_COVER | OFTString | 50.0k | {"21": 245}, {"21": 107, "22": 30, "23": 190}, {"22": 353, "23": 3} | |
| CROP_COVER | OFTString | 14.6k | {"121": 0.18}, {"121": 0.25}, {"122": 0.46, "123": 0.0} | |
| MUNI_ID | OFTInteger64 | 2 | 979003, 979003, 979003 | |
| SCHOOL_DIS | OFTInteger64 | 28 | 3612180, 3612180, 3612180 | |
| ACREAGE_AD | OFTReal | 50.0k | 0.17808242662898, 0.249766845018951, 0.461812937517648 | |
| MKT_VAL_LA | OFTReal | 7.0k | 197.0, 209.0, 292.0 | |
| MKT_VAL_BL | OFTReal | 6.8k | 276.0, 248.0, 341.0 | |
| MKT_VAL_TO | OFTReal | 11.2k | 473000.0, 457000.0, 633000.0 | |
| ZIP_CODE | OFTString | 43 | 11542, 11542, 11542 | |
| BUILDINGS | OFTInteger64 | 44 | 1, 1, 2 | |
| MAIL_ADDRE | OFTString | 50.0k | 10 HARBOR HILL RD, 120 HARBOR HILL RD, 25 LA MARCOS AVENUE | |
| MAIL_AD_01 | OFTString | 1.2k | GLEN COVE NY 11542, GLEN COVE NY 11542, GLEN COVE NY 11542 | |
| OWNER_OCCU | OFTString | 3 | F, F, F | |
| USPS_RESID | OFTString | 3 | ?, ?, ? | |
| CENSUS_TRA | OFTInteger64 | 156 | 517200, 517200, 517200 | |
| CENSUS_BLK | OFTInteger | 7 | 4, 4, 2 | |
| CENSUS_BLO | OFTInteger | 336 | 4007, 4007, 2011 | |
| AREA_METER | OFTReal | 50.0k | 720.660542385899, 1010.75166937377, 1868.85572221945 | |
| FLD_ZONE | OFTString | 23 | {AE,X}, {X}, {AE} | |
| ZONE_SUBTY | OFTString | 15 | {NULL,"0.2 PCT ANNUAL CHANCE FLOOD HAZARD"}, {"0.2 PCT ANNUAL CHANCE FLOOD HAZARD"}, {NULL} | |
| PLACE_GNIS | OFTInteger64 | 66 | 979003, 979003, 979003 | |
| ALT_ID_1 | OFTString | 50.0k | 21008800300300000000, 21008800310000000000, 21003800210300000000 | |
| ALT_ID_2 | OFTString | 30 | 280600, 280600, 280600 | |
| ELEVATION | OFTString | 50.0k | {"max": -1.5, "min": -1.5, "mean": -1.5}, {"max": -1.5, "min": -1.5, "mean": -1.5}, {"max": -1.5, "min": -1.5, "mean": -1.5} | |
| ROBUST_ID | OFTString | 50.0k | AACM29qNbJwPip_R, AACM2yZh83fmLpnA, AACM209Dl9D4q7Ss | |
| CALC_ACREA | OFTReal | 50.0k | 0.178082426628979, 0.249766845018952, 0.461812937517648 | |
| COUNTY_NAM | OFTString | 1 | Nassau, Nassau, Nassau | |
| COUNTY_FIP | OFTInteger64 | 1 | 36059, 36059, 36059 | |
| STATE_ABBR | OFTString | 1 | NY, NY, NY | |
| CTY_ROW_ID | OFTInteger64 | 50.0k | 350805, 352444, 356023 |
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.