This polygon layer contains the boundaries of the 94 block groups in the City of Cambridge for the 1990 US Census.
Data from US Bureau of the Census. GIS data layer created by Cambridge GIS using TIGER/Lines and local data. Adjusted Census TIGER/Lines by conflating with Cambridge centerline, rail, and City boundary as a guide.
Purpose
Created for spatial analysis of associated Census 1990 demographic data. Used for planning, mapping, and Community Development Block Grant (CBDG) purposes by the Community Development Department.
Temporal Extent
Currentness Reference
ground condition
Time Instant
1990
Bounding Box
West
-71.160558
East
-71.063810
North
42.403841
South
42.352358
Theme Keyword
Municipal
Theme Keyword Thesaurus
HGL Category Keyword Thesaurus
Theme Keyword
Census
Boundaries
Census districts
Theme Keyword Thesaurus
LCSH
ISO Topic Category
boundaries
Theme Keyword
Census block groups
Theme Keyword Thesaurus
None
Place Keyword
Massachusetts
Cambridge
Place Keyword Thesaurus
GNIS
Temporal Keyword
Access Restrictions
Access is granted to Harvard University Affiliates only. Affiliates are limited to current faculty, staff and students.
Use Restrictions
For educational non-commercial use only.
The City of Cambridge provides Geographic Information Systems ("GIS") data in good faith. The City makes no warranty in regard to the data whatsoever, including, but not limited to, a warranty of the accuracy of the data. The party requesting the data agrees that the City has no liability arising from any incomplete, incorrect, inaccurate or misleading data provided.
Status
Complete
Maintenance and Update Frequency
None planned
Point of Contact
Contact Person
GIS Manager
Delivery Point
831 Massachusetts Ave., 2nd Floor
City
Cambridge
State
MA
Postal Code
02139
Contact Telephone
617-349-4140
Contact Facsimile Telephone
617-349-6165
Contact Electronic Mail Address
gis@cambridgema.gov
Native Data Set Environment
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350
Data Quality Information
Attribute Accuracy Report
Attributes from US Census and TIGER data.
Logical Consistency Report
Unknown
Completeness Report
Unknown
Horizontal Positional Accuracy Report
Polygon boundaries from TIGER line files following City of Cambridge planimetric and centerline data.
Lineage
Source
Originator
Cambridge (Mass.). Geographic Information Systems
Publication Date
20091027
Title
Citywide vector data
Geospatial Data Presentation Form
vector digital data
Publication Information
Publication Place
Cambridge, MA
Publisher
City of Cambridge GIS Department
Other Citation Details
1 DVD-ROM ; 4 3/4 in.
Type of Source Media
DVD-ROM
Source Temporal Extent
Time Period Information
Single Date/Time
Calendar Date
20091027
Source Currentness Reference
publication date
Contribution
Source data disc.
Spatial Data Organization Information
Direct Spatial Reference Method
Vector
Point and Vector Object Information
SDTS Terms Description
SDTS Point and Vector Object Type
G-polygon
Point and Vector Object Count
94
Spatial Reference Information
Horizontal Coordinate System Definition
Planar
Grid Coordinate System
Grid Coordinate System Name
State Plane Coordinate System
State Plane Coordinate System
SPCS Zone Identifier
2001
Lambert Conformal Conic
Planar Coordinate Information
Planar Coordinate Encoding Method
coordinate pair
Coordinate Representation
Abscissa Resolution
0.000013
Ordinate Resolution
0.000013
Planar Distance Units
survey feet
Geodetic Model
Horizontal Datum Name
North American Datum of 1983
Ellipsoid Name
Geodetic Reference System 80
Semi-major Axis
6378137.000000
Denominator of Flattening Ratio
298.257222
Entity and Attribute Information
Entity Type
Entity Type Label
Cambridge09_BlockGroups1990
Entity Type Definition
Census 1990 Block Groups
Entity Type Definition Source
Cambridge GIS
Attributes
OBJECTID
Internal feature number. (Sequential unique whole numbers that are automatically generated.)
Definition Source
ESRI
BLKGRPID
Unique block group ID
Definition Source
Cambridge GIS
AREA
Feature area
Definition Source
None
LEN
Feature length
Definition Source
None
Shape
Feature geometry. (Coordinates defining the features.)
Definition Source
ESRI
SHAPE.AREA
Feature area.
Definition Source
ESRI
SHAPE.LEN
Feature length.
Definition Source
ESRI
Distribution Information
Format Name
Shapefile
Distributor
Harvard Geospatial Library
Online Access
http://hgl.harvard.edu
Name
Metadata Reference Information
Metadata Date
20100326
Metadata Contact
Contact Information
Contact Organization Primary
Contact Organization
Harvard Geospatial Library
Contact Position
Geospatial Resources Cataloger
Contact Address
Address
Harvard University Library
Address
Office For Information Systems
Address
90 Mount Auburn Street
City
Cambridge
State or Province
MA
Postal Code
02138
Country
USA
Contact Voice Telephone
617-495-2417
Contact Facsimile Telephone
617-496-0440
Contact Electronic Mail Address
hgl_ref@hulmail.harvard.edu
Hours of Service
Monday - Friday, 9:00 am - 4:00 pm EST-USA
Metadata Standard Name
FGDC Content Standards for Digital Geospatial Metadata
