Downloads
Overview
Note: For source and production information, see the What MassGIS Provides section on the main MassGIS Census 2000 Web page.
Attributes
The polygon attributes (census2000tracts_poly.dbf and census2000tracts_poly_orig.dbf) for the Census 2000 Tracts shapefiles distributed by MassGIS contain the following fields:
| Field Name | Type / Width | Description |
| AREA | N / 16 | Area of polygon(s) in square meters. |
| PERIMETER | N / 16 | Perimeter of polygon(s) in meters. |
| STATE | C / 2 | State ID Code. (Massachusetts = 25) |
| COUNTY | C / 3 | County code (FIPS-ID without“25”) |
| TRACT | C / 6 | Census 2000 Tract Code |
| CT_ID | C / 20 | Unique Blockgroup ID value |
| LOGRECNO | C / 7 | Common field to join/link to related attribute tables |
| BLK_COUNT | N / 3 | Number of blocks in the census tract |
| TOTAL_POP | N / 10 | 100% Count of Population (from SF1) |
| SAMP_POP | N / 10 | Sampled Count of Population (from SF3) |
| DRY_PCT | N / 8 | Percentage of non-water area for the block |
| DRY_ACRES | N / 12 | Non-water area, in Acres |
| DRY_SQMI | N / 10 | Non-water area, in Square Miles |
| DRY_SQKM | N / 10 | Non-water area, in Square Kilometers |
For the most accurate display of population density by Census Tract, normalize TOTAL_POP by any of the last three items.
Note: The 100% population counts and the sampled population counts for any given census tract will often have different values. This is due to the nature of sampling and extrapolation techniques in statistics. It is recommended that when using SF1-derived data, the 100% population count be used, whereas when SF3-derived data is used, the sampled population should be utilized instead in order to maintain consistency between the head count and the tabular values.
Related demographics tables
The following data tables, available in dBase format (.dbf), which provide detailed demographics information, may be joined to the Census Tracts shapefiles on the LOGRECNO item. See ct_fields.xls (Excel format) and ct_fields.dbf (dBase format).
(plus field description table, in a zip file; 883 KB) or click the Download link after each table description to download that table in a zip file
ancestry_and_foreign_place_of_birth.dbf (SDE name: GISDATA.CEN2K_CT_ANC_FOR_PLACE_BIRTH)
Lists number of individuals with specific ancestry types and number of foreign-born individuals from specific regions. Download
households_by_owner_renter_income.dbf (SDE name: GISDATA.CEN2K_CT_HH_OWN_RENT_INC)
Lists number of households that fall within a certain income threshold, distinguished by owner vs. renter status. Also lists median income values. Download
households_by_partner_type.dbf (SDE name: GISDATA.CEN2K_CT_HOUSEH_PARTNER)
Number of households distinguished by marital status, gender of primary householder, and gender of primary householder's partner. Download
language_spoken_by_age.dbf (SDE name: GISDATA.CEN2K_CT_LANG_SPOK_AGE)
Number of individuals speaking a very specific language, broken down by child vs. adult age groups. Download
median_incomes_by_family_type.dbf (SDE name: GISDATA.CEN2K_CT_MED_INC_FAM)
Median incomes for families, with specific values for married couples and presence/non-presence of children. Download
mental_physical_disabled_pop_by_age.dbf (SDE name: GISDATA.CEN2K_CT_MEN_PHYS_DIS_AGE)
Listing of all individuals age 5 and over with physical or mental disabilities, broken down by gender, age grouping, and employment status. Download
population_by_habitation_tenure_ownership.dbf (SDE name: GISDATA.CEN2K_CT_POP_HAB_TEN_OWN)
Population counts for year of entry into present housing unit, distinguished by owner vs. renter status. Download