{
  "GEOID": {
    "type": "string",
    "description": "5-character stable geography identifier; county=2-character state FIPS +3-character county FIPS; ZCTA=5-character ZCTA. Preserve leading zeros."
  },
  "zcta": {
    "type": "string",
    "description": "Census ZCTA, not a complete USPS delivery ZIP directory."
  },
  "state_fips": {
    "type": "string",
    "description": "County rows only: two-character state FIPS."
  },
  "county_fips": {
    "type": "string",
    "description": "County rows only: three-character county FIPS."
  },
  "name": {
    "type": "string",
    "description": "County name with state, or ZCTA +identifier."
  },
  "ALAND": {
    "type": "number",
    "unit": "m2",
    "description": "Census land area; source attribute, not computed from simplified polygons."
  },
  "AWATER": {
    "type": "number",
    "unit": "m2",
    "description": "Census water area."
  },
  "latitude": {
    "type": "number",
    "unit": "decimal degrees",
    "description": "Official Gazetteer representative internal point."
  },
  "longitude": {
    "type": "number",
    "unit": "decimal degrees",
    "description": "Official Gazetteer representative internal point."
  },
  "acs_year": {
    "type": "number",
    "description": "2024 ACS5-year vintage; observation period2020–2024."
  },
  "acs_period": {
    "type": "string",
    "description": "2020-2024 survey period."
  },
  "acs_special_values": {
    "type": "string",
    "description": "Semicolon-separated original source variable=raw value for negative/non-numeric special values. Numeric value is null."
  },
  "population": {
    "type": "number|null",
    "sourceVariable": "B01003_E001",
    "unit": "people",
    "description": "Published ACS5-year estimate; null if missing/special."
  },
  "population_moe": {
    "type": "number|null",
    "sourceVariable": "B01003_M001",
    "unit": "people",
    "description": "Published margin of error at90% confidence; null if unavailable/special; never imputed as0."
  },
  "median_household_income": {
    "type": "number|null",
    "sourceVariable": "B19013_E001",
    "unit": "2024 inflation-adjusted USD",
    "description": "Published ACS5-year estimate; null if missing/special."
  },
  "median_household_income_moe": {
    "type": "number|null",
    "sourceVariable": "B19013_M001",
    "unit": "2024 inflation-adjusted USD",
    "description": "Published margin of error at90% confidence; null if unavailable/special; never imputed as0."
  },
  "median_age": {
    "type": "number|null",
    "sourceVariable": "B01002_E001",
    "unit": "years",
    "description": "Published ACS5-year estimate; null if missing/special."
  },
  "median_age_moe": {
    "type": "number|null",
    "sourceVariable": "B01002_M001",
    "unit": "years",
    "description": "Published margin of error at90% confidence; null if unavailable/special; never imputed as0."
  },
  "housing_units": {
    "type": "number|null",
    "sourceVariable": "B25001_E001",
    "unit": "housing units",
    "description": "Published ACS5-year estimate; null if missing/special."
  },
  "housing_units_moe": {
    "type": "number|null",
    "sourceVariable": "B25001_M001",
    "unit": "housing units",
    "description": "Published margin of error at90% confidence; null if unavailable/special; never imputed as0."
  }
}