This point layer contains locations of six types of historical markers throughout Cambridge, including blue oval historic markers, African American Heritage Trail markers, North Cambridge historic markers, granite tombstone markers, cast-iron markers, and Cambridge History Stations. The markers commemorate significant sites, events, buildings, and prominent figures in Cambridge history.
Purpose
Created for general use within the Cambridge Historical Commission and for map production.
Supplemental Information
Properties marked with blue oval historic markers are not necessarily protected by any design review or other regulation by the Historical Commission. The sites were chosen not for the architectural significance of the existing structures, but for the sites? relationship to important events or persons. The blue oval marker program began in 1976, and today there are nearly one hundred markers throughout the city.
Temporal Extent
Currentness Reference
publication date
Time Instant
2000
Bounding Box
West
-71.148796
East
-71.077272
North
42.402137
South
42.355835
Theme Keyword
Municipal
Theme Keyword Thesaurus
HGL Category Keyword Thesaurus
Theme Keyword
Historical markers
Historic sites
Theme Keyword Thesaurus
LCSH
ISO Topic Category
location
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
The list of historic markers changes when the Cambridge Historical Commission creates new plaques or markers. Updates are not routine; only a handful of markers are created every few years.
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
Unknown
Logical Consistency Report
Unknown
Completeness Report
Unknown
Horizontal Positional Accuracy Report
The specific location of marker points on parcels has not been exhaustively field checked or updated within the data layer.
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
Entity point
Point and Vector Object Count
153
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
0.000009
Ordinate Resolution
0.000009
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_HistoricalMarkers
Entity Type Definition
Historical Markers
Entity Type Definition Source
Cambridge GIS
Attributes
OBJECTID
Internal feature number. (Sequential unique whole numbers that are automatically generated.)
Definition Source
ESRI
DESCRIPTIO
Location description (Text.)
Definition Source
Cambridge GIS
NAME
Name of site (Text.)
Definition Source
None
NEIGHBORHO
Neighborhood (Text.)
Definition Source
Cambridge GIS
MARKER_TYP
Type of historical marker (Text.)
Definition Source
Cambridge GIS
ADDRESS
Street address (Text.)
Definition Source
Cambridge GIS
Shape
Feature geometry. (Coordinates defining the features.)
Definition Source
ESRI
Distribution Information
Format Name
Shapefile
Distributor
Harvard Geospatial Library
Online Access
http://hgl.harvard.edu
Name
Metadata Reference Information
Metadata Date
20100421
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
