Census Traffic Analysis Zones, 1990 - San Francisco Bay Area, California
Abstract/Contents
- Abstract
- This polygon shapefile contains the Census Traffic Analysis Zones (CTAZ) for California for the year 1990. The CTAZ zones range in size from multiple-block level in downtown San Francisco, Oakland, and San Jose to block group and tract level in suburban and rural areas of the region. The CTAZ zones nest within the older, MTC 1099 regional travel analysis zone (RTAZ) system. A traffic analysis zone (TAZ) is a statistical entity delineated by state or local transportation officials for tabulating traffic-related census data-especially journey-to-work and place-of-work statistics. A TAZ usually consists of one or more census blocks, block groups, or census tracts. For the 1990 census, TAZs were defined as part of the Census Transportation Planning Package (CTPP). The U.S. Census Bureau first provided data for TAZs in conjunction with the 1980 census, when it identified them as ''traffic zones.'' Each TAZ is identified by a six-character alphanumeric code that is unique within county or statistically equivalent entity. For the 1990 census, TAZ codes were unique within CTPP area, which generally conformed to a metropolitan area. This layer is part of the Bay Area Metropolitan Transportation Commission (MTC) GIS Maps and Data collection.
- Purpose
- This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data.
Description
| Type of resource | cartographic, software, multimedia |
|---|---|
| Form | Shapefile |
| Extent | 3.86 |
| Place | Oakland, California, US |
| Publisher | California. Metropolitan Transportation Commission |
| Date valid | 1990 |
| Publication date | 2002 |
| Language | English |
| Digital origin | born digital |
| Map data | Scale not given. ; Custom projection W 123°32ʹ--W 121°9ʹ47ʺ/N 38°51ʹ57ʺ--N 36°53ʹ21ʺW 123°31ʹ57ʺ--W 121°12ʹ26ʺ/N 38°51ʹ52ʺ--N 36°53ʹ39ʺ, Scale not given ; EPSG::4326 |
Creators/Contributors
| Creator | California. Metropolitan Transportation Commission |
|---|
Subjects
| Subject | Transportation demand management |
|---|---|
| Subject | Population |
| Subject | Traffic estimation |
| Subject | San Francisco Bay Area (Calif.) |
| Subject | San Francisco (Calif.) |
| Subject | Contra Costa County (Calif.) |
| Subject | Napa County (Calif.) |
| Subject | San Mateo County (Calif.) |
| Subject | San Mateo County (Calif.) |
| Subject | Solano County (Calif.) |
| Subject | Sonoma County (Calif.) |
| Subject | Marin County (Calif.) |
| Subject | Alameda County (Calif.) |
| Subject | 1990 |
| Subject | Planning and Cadastral |
| Subject | Transportation |
| Genre | Geospatial data |
| Genre | Cartographic dataset |
Bibliographic information
| WGS84 Cartographics | This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection. |
|---|---|
| Location | https://purl.stanford.edu/xd776gb4294 |
Access conditions
- Use and reproduction
- This item is in the public domain. There are no restrictions on use.
- Copyright
- This work is in the Public Domain, meaning that it is not subject to copyright.
Preferred citation
- Preferred citation
- California, Metropolitan Transportation Commission. (2002). Census Traffic Analysis Zones, 1990 - San Francisco Bay Area, California. MTC. Available at: http://purl.stanford.edu/xd776gb4294.
Collection
Metropolitan Transportation Commission GIS Maps & Data
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