Blocks—Census Blocks – A block is the smallest geographic unit for which the Census Bureau tabulates 100% data. It is a subdivision of a census tract. Many blocks correspond to individual city blocks bounded by streets, but blocks – especially in rural areas – may include many square miles and may have some boundaries that are not streets
See a Census Block map for TJPDC
Block group (BG). A subdivision of a census tract, a block group is the smallest geographic unit for which the Census Bureau tabulates sample data.
Block Groups generally contain between 250 and 550 housing units, with the ideal size being 400 housing units.Or, contain between 600 and 3,000 people, with an optimum size of 1,500 people.)
Block Groups never cross the boundaries of census tracts, counties, or states but may cross the boundary of any other geographic entity required as a census block boundary.
See a Census Block Group Map for TJPDC
Census Tract. A small, relatively permanent statistical subdivision of a county delineated by a local committee of census data users for the purpose of presenting data. Census tract boundaries normally follow visible features, but may follow governmental unit boundaries and other non-visible features in some instances; they always nest within counties. Census Tracts are designed to be relatively homogeneous units with respect to population characteristics, economic status, and living conditions at the time of establishment. Census tracts average about 4,000 inhabitants. They may be split by any sub-county geographic entity. See a Census Tract Map for TJPDC
Disabilities. The data on disability status were derived from answers to long-form questionnaire Items 16 and 17. Item 16 was a two-part question that asked about the existence of the following long-lasting conditions: (a) blindness, deafness, or a severe vision or hearing impairment (sensory disability)
and (b) a condition that substantially limits one or more basic physical activities, such as walking, climbing stairs, reaching, lifting, or carrying (physical disability). Item 16 was asked of a sample of the population 5 years old and over.
Item 17 was a four-part question that asked if the individual had a physical, mental, or emotional condition lasting 6 months or more that made it difficult to perform certain activities. The four activity categories were: (a) learning, remembering, or concentrating (mental disability); (b) dressing, bathing, or getting around inside the home (self-care disability); (c) going outside the home alone to shop or visit a doctor’s office (going outside the home disability); and (d) working at a job or business (employment disability). Categories 17a and 17b were asked of a sample of the population 5 years old and over; 17c and 17d were asked of a sample of the population 16 years old and over.
For data products that use the items individually, the following terms are used: sensory disability
for 16a, physical disability for 16b, mental disability for 17a, self-care disability for 17b, going outside the home disability for 17c, and employment disability for 17d. For data products that use a disability status indicator, individuals were classified as having a disability if any of the following three conditions were true: (1) they were 5 years old and over and had a response of ‘‘yes’’ to a sensory, physical, mental or self-care disability; (2) they were 16 years old and over and had a response of ‘‘yes’’ to going outside the home disability; or (3) they were 16 to 64 years old and had a response of ‘‘yes’’ to employment disability.
Gross Rent. Gross rent is the contract rent plus the estimated average monthly cost of utilities (electricity, gas, water and sewer) and fuels (oil, coal, kerosene, wood, etc.) if these are paid by the renter (or paid for the renter by someone else).
Gross Rent as a Percentage of Household Income in 1999. Gross rent as a percentage of household income in 1999 is a computed ratio of monthly gross rent to monthly household income (total household income in 1999 divided by 12). The ratio is computed separately for each unit and is rounded to the nearest tenth.
Group Quarters. The group quarters population includes all people not living in households. Two general categories of people in group quarters are recognized: (1) the institutionalized population and (2) the noninstitutionalized population.
Household. A household includes all of the people who occupy a housing unit. (People not living in households are classified as living in group quarters.) A housing unit is a house, an apartment, a mobile home, a group of rooms, or a single room occupied (or if vacant, intended for occupancy) as separate living quarters. Separate living quarters are those in which the occupants live separately from any other people in the building and that have direct access from the outside of the building or through a common hall. The occupants may be a single family, one person living alone, two or more families living together, or any other group of related or unrelated people who share living quarters.
Householder. The data on relationship to householder were derived from the question, ‘‘How is this person related to Person 1,’’ which was asked of Persons 2 and higher in housing units. One person in each household is designated as the householder (Person 1). In most cases, the householder is the person, or one of the people, in whose name the home is owned, being bought, or rented. If there is no such person in the household, any adult household member 15 years old and over could be designated as the householder (i.e., Person 1).
Income of households. This includes the income of the householder and all other individuals 15 years old and over in the household, whether they are related to the householder or not.
Institutionalized Population. The institutionalized population includes people under formally authorized, supervised care or custody in institutions at the time of enumeration; such as correctional institutions, nursing homes, and juvenile institutions.
Mortgage Payment. The data on mortgage payment was asked on a sample basis at owner-occupied housing units. The regular monthly amount required to be paid to the lender for the first mortgage (deed of trust, contract to purchase, or similar debt) on the property were provided. Amounts are included even if the payments are delinquent or paid by someone else.
Noninstitutionalized Population. The noninstitutionalized population includes all people who live in group quarters other than institutions, such as college dormitories, military quarters, and group homes. Also, included are staff residing at institutional group quarters.
Poverty. Poverty status is determined by examining the household composition and the income available to the household during the year prior to the census. Income includes pre Tax earnings, unemployment compensation, workers compensation, Social Security, Supplemental Security Income, public assistance, veterans’ payments, survivor benefits, pension or retirement income, interest, dividends, rents, royalties, income from estates, trusts, educational assistance, alimony, child support, assistance from outside the household, and other miscellaneous sources. It does not include capital gains or non-cash income like housing vouchers or food stamps. This income is compared with 48 different "thresholds" that depend on the number of persons in the family or household and their age. The same thresholds are used throughout the United States. They are adjusted for the Consumer Price Index. Individuals for whom income cannot be determined or who are not in households (they may be in instructions, nursing homes etc.) are excluded from the population for whom poverty status is determined. If a family or person falls below the threshold, they are said to be "below the poverty level". For details see the Census Web site.
Selected Monthly Owner Costs as a Percentage of Household Income in 1999. The information on selected monthly owner costs as a percentage of household income in 1999 is the computed ratio of selected monthly owner costs to monthly household income in 1999. The ratio was computed separately for each unit and rounded to the nearest whole percentage. It is based on questions asked of a sample of households.
Vehicles Available. The data on vehicles available were obtained on a sample basis at occupied housing units. These data show the number of passenger cars, vans, and pickup or panel trucks of 1-ton capacity or less kept at home and available for the use of household members. Vehicles rented or leased for 1 month or more, company vehicles, and police and government vehicles are included if kept at home and used for non-business purposes. Dismantled or immobile vehicles are excluded. Vehicles kept at home but used only for business purposes also are excluded.