View Metadata
Addresses - City of Newton
- Identification Information
- Data Quality Information
- Spatial Data Organization Information
- Spatial Reference Information
- Entity and Attribute Information
- Distribution Information
- Metadata Reference Information
- Identification Information
- Citation
- Originator
- City of Newton GIS
- Publication Date
- 1998
- Title
- Addresses - City of Newton
- Geospatial Data Presentation Form
- vector digital data
- Online Linkage
- https://hgl.harvard.edu/catalog/harvard-nwtnaddrspt
- Abstract
- This data layer contains point locations representing all known addresses in Newton. Originally the parcel file was used for this purpose. However, the parcel file is limited to providing one address or address range per parcel. A point file can better represent parcels that have multiple addresses on different streets (corner lots) and can also be used to catch common misspellings or streets with missing spaces such as Marymount Rd (instead of Mary Mount Rd). There are 22 duplicate addresses (two properties in different locations, same address) in Newton.
- Purpose
- This layer was created primarily for address matching purposes and 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. This layer will provide a basemap for layers related to real property as well as disaster and emergency planning (address layers are useful in identifying building structures and to facilitate applications that search by street name and address.) More advanced user applications may focus on urban planning, public works, or utilities purposes (including defining boundaries, managing assets and facilities, integrating attribute databases with geographic features, spatial analysis, and presentation output.
- Supplemental Information
- The City of Newton's Engineering Department maintains this data layer using a customized GIS editing application. Lot lines removed when properties are merged are, along with the appropriate label point, deleted. New boundaries are digitized directly from sub-division plans filed with the city by developers or Coordinate Geometry (COGO) data entry is used when available. Control points for the digitizing are property boundary junctions visible on both the parcel coverage and the sub-division plan.
- Temporal Extent
- Currentness Reference
- approximate ground condition
- Time Instant
- 1998
- Bounding Box
- West
- -71.267100
- East
- -71.156796
- North
- 42.366831
- South
- 42.287722
- ISO Topic Category
- location
- Theme Keyword
- Municipal
- Theme Keyword Thesaurus
- HGL Category Keyword Thesaurus
- Theme Keyword
- Street addresses
- City planning
- Urban land use
- Real property
- Theme Keyword Thesaurus
- LCSH
- Place Keyword
- Newton
- Massachusetts
- Place Keyword Thesaurus
- GNIS
- Temporal Keyword
- Access Restrictions
- Access is granted to licensee (Harvard University) only. Available only to Harvard University affiliates.
- Use Restrictions
- For educational or non-commercial use only.
- Status
- Complete
- Maintenance and Update Frequency
- As needed
- Point of Contact
- Contact Organization
- City of Newton GIS
- Delivery Point
- Information Technology Department
- Delivery Point
- City Hall Room 107
- Delivery Point
- 1000 Commonwealth Avenue
- City
- Newton Center
- State
- MA
- Postal Code
- 02459-1400
- Country
- USA
- Contact Telephone
- 617-796-1180
- Contact Telephone
- 617-796-1000
- Credit
- GIS data supplied by City of Newton GIS.
- Native Data Set Environment
- Microsoft Windows NT Version 4.0 (Build 1381) Service Pack 6; ESRI ArcCatalog 8.2.0.700
- Data Quality Information
- Attribute Accuracy Report
- SBL-ID Attribute While no systematic checking has been completed, the SBL-ID attribute contains the correct SBL for over 95% of all properties. Condominiums are the source of most of the remaining inaccuracies. This is because the Assessor's CAMA database structure has no means (in 1998) for correctly modeling the one-to-many relationship between the land of the parcel and its condominium units. This has often resulted in the SBL being modified with a letter extension, one for each of the condominium units. This has sometimes eliminated the SBL for the original lot all together, leaving the CAMA database unsynchronized with the Assessor's maps. Note that most Section/block/lot (SBL) IDs have a space between the block and the lot. This space is occasionally filled by a letter extension to the block (e.g. 23023 0004 vs. 23023A0004). Note also that SBLs with a section of 99 and a block of 099 are "dummy" SBLs. These are created as placeholders for polygons such as ponds and median strips that must have a centroid to preserve topology but are not property parcels. A dummy SBL was assigned to avoid confusion. These "dummy" SBLs do not appear in the Assessors CAMA database.
- Logical Consistency Report
- For layers containing line or polygon features, Newton's data layers are "topologically clean". This was verified with Arc/Info software version 7.x in 1998 and is an ongoing part of data maintenance for the relevant data layers.
- Horizontal Positional Accuracy Report
- Points fall within their respective property boundaries. Note: No systematic and quantitative review of property boundary accuracy has ever been conducted. However, several qualitative observations based on experience using the data are possible. The street right-of-way lines overlay the orthophoto base map very well, falling on or close to the apparent back-of-sidewalk visible on the photos.The edge-of-pavement data layer was compiled from aerial photography for Boston Edison to an absolute accuracy specification of +/- 2.5 feet. Again, the right-of-way lines match up well in this comparison. Less is known about the accuracy of the internal property boundaries. Casual observations suggest they are sometimes as accurate as the right-of-way lines and sometimes much less. Some observations of boundary line discrepancies relative to property boundary lines such as fences and hedges visible on the orthophotos indicate that internal property boundaries may be off by at least +/- 5 feet.
- Lineage
- Source
- Originator
- City of Newton Assessor's Office
- Publication Date
- 1998
- Title
- Assessor's Computer Assisted Mass Appraisal
- Type of Source Media
- computer program
- Source Temporal Extent
- Time Period Information
- Single Date/Time
- Calendar Date
- 1998
- Source Currentness Reference
- ground condition
- Contribution
- Address points were added to this layer from the CAMA system for addresses that are not in the parcels data, for historical addresses and for commonly misspelled street names.
- Source
- Originator
- City of Newton GIS
- Publication Date
- Unknown
- Title
- Newton GIS Parcels Layer
- Source Scale Denominator
- 1000
- Type of Source Media
- computer program
- Source Temporal Extent
- Time Period Information
- Single Date/Time
- Calendar Date
- 1992
- Source Currentness Reference
- approximate ground condition
- Contribution
- Some Attribute information for this ADDRESSES layer were derived from the PARCELS datalayer.
- 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
- 24389
- 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
- 0.000015
- Ordinate Resolution
- 0.000015
- 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
- Vertical Coordinate System Definition
- Altitude System Definition
- Altitude Datum Name
- National Geodetic Vertical Datum of 1929
- Altitude Resolution
- 1.000000
- Altitude Encoding Method
- Explicit elevation coordinate included with horizontal coordinates
- Entity and Attribute Information
- Entity Type
- Entity Type Label
- Addresses in Newton
- Entity Type Definition
- ESRI Shapefile. Points show address locations
- Entity Type Definition Source
- ESRI
- Attributes
- ADDRS_ID
- Internal Feature Identifier
- Definition Source
- Newton GIS
- SBL_ID
- Unique property id in form Section/block/lot
- Definition Source
- Newton GIS
- PRE_DIR
- Street prefix
- Definition Source
- Newton GIS
- F_ADD
- Low address used by ArcView geocoding
- Definition Source
- Newton GIS
- T_ADD
- High address used by ArcView geocoding.
- Definition Source
- Newton GIS
- STREET_NAM
- Street name used by ArcView geocoding
- Definition Source
- Newton GIS
- STREET_TYP
- Street name used by ArcView geocoding.
- AVE
- Avenue
- CIR
- Circle
- CT
- Court
- DR
- Drive
- PARK
- Park
- PKY
- Parkway
- RD
- Road
- ST
- Street
- TER
- Terrace
- Definition Source
- Newton GIS
- SUF_DIR
- Street suffix used by ArcView geocoding
- Definition Source
- Newton GIS
- SOURCE
- The source of the address.
- PARCELS
- From the parcel file
- ENGDEPT
- From engineering department plans
- CAMA
- From the Assessor's CAMA data
- DBLEADD
- From list of known double addresses
- HIST
- Historic or former addresses
- VOTRLST
- Address found on a voter list
- MISTAKE
- Either from a data entry mistake or a common misspelling
- ALTSPEL
- Alternate spellings (ie. "MT IDA" instead of "MOUNT IDA")
- Definition Source
- Newton GIS
- VILLAGE
- Village or neighborhood within City of Newton
- Definition Source
- Newton GIS
- ZIPCODE
- USPS mail code
- Definition Source
- Newton GIS
- NWTNADDRSPT.FID
- Internal feature number. (Sequential unique whole numbers that are automatically generated.)
- Definition Source
- ESRI
- SHAPE
- Feature geometry. (Coordinates defining the features.)
- Definition Source
- ESRI
- Distribution Information
- Format Name
- Shape
- Distributor
- Harvard Geospatial Library
- Name
- Metadata Reference Information
- Metadata Date
- 20021009
- Metadata Contact
- Contact Information
- Contact Organization Primary
- Contact Organization
- Harvard Geospatial Library
- Contact Person
- Geospatial Resources Cataloger
- Contact Address
- Address
- Office of Information Systems
- Address
- 1280 Massachusetts Avenue
- City
- Cambridge
- State or Province
- MA
- Postal Code
- 02138
- Country
- USA
- Contact Voice Telephone
- 617-295-12417
- Contact Facsimile Telephone
- 617-496-0440
- Contact Electronic Mail Address
- hgl_ref@hulmail.harvard.edu
- Metadata Standard Name
- FGDC Content Standards for Digital Geospatial Metadata
- Metadata Standard Version
- FGDC-STD-001-1998
- Metadata Extensions
- Online Linkage
- http://www.esri.com/metadata/esriprof80.html
- Profile Name
- ESRI Metadata Profile
