Boston Street Segments (SAM System)

The Boston Archive

Dataset

Boston Street Segments (SAM System)

City of Boston street segments data from the Street Address Management (SAM) system. Updated nightly.

Dataset

Publisher: Boston Maps
Spatial coverage: Boston, Massachusetts
Fields: 38
Keywords: boston, boston segments, boston street segments, boston streets, bparc, centerlines, ckan, daily, road data, roads, segments, street centerlines, street data, street segments, streets
Publisher's page: https://data.boston.gov/dataset/boston-street-segments-sam-system

Artifacts

“Preserved” means the archive holds the bytes and their digest. “Referenced” means it holds the record of them and nothing more. The archive does not claim a holding it cannot prove.

Format	Preservation	Size	Digest	Source
ArcGIS GeoServices REST API	referenced	—	`—`	source
CSV	preserved	7307207	`c3e44b631158bb26962558b2e08b7376d687c579c86e768eba7520cdbf92403e`	source
GeoJSON	preserved	22441292	`834e4752f0a71f8217d0f994f7fa645357f34c55da9c20cceda0a69f7428b014`	source
HTML	referenced	—	`—`	source
KML	preserved	3095732	`b22bfd6d74bdf94c185c3edecc180b746910f2c032915a872b1ff2ca3186c914`	source
SHP	referenced	—	`—`	source

Column dictionary

The publisher's own dictionary, preserved verbatim. The archive does not reword a schema into its own vocabulary — how the publisher named a column is evidence about the publisher.

Column	Type	Description
`SEGMENT_ID`	numeric
`L_F_ADD`	numeric
`L_T_ADD`	numeric
`R_F_ADD`	numeric
`R_T_ADD`	numeric
`STREET_ID`	numeric
`PRE_DIR`	text
`ST_NAME`	text
`ST_TYPE`	text
`SUF_DIR`	text
`ALTERNATE_NAME`	text
`CFCC`	text
`SPEEDLIMIT`	numeric
`ONEWAY`	text
`F_ZLEV`	text
`T_ZLEV`	text
`FT_COST`	numeric
`TF_COST`	numeric
`FT_DIR`	text
`TF_DIR`	text
`SHIELD`	text
`HWY_NUM`	text
`MUN_L`	text
`MUN_R`	text
`NBHD_L`	text
`NBHD_R`	text
`STATE00_L`	text
`STATE00_R`	text
`COUNTY00_L`	numeric
`COUNTY00_R`	numeric
`MCD00_L`	numeric
`MCD00_R`	numeric
`ZIP_L`	text
`ZIP_R`	text
`ownership`	text
`ROUTE_ID`	text
`Shape_Length`	numeric
`shape_wkt`	text

The complete dictionary, exactly as the publisher words it, is served as its own holding at /asset/af808440ca8ac53a4566178b0c6fd70b/boston-street-segments-sam-system-columns.json — 2451 bytes, SHA-256 af808440ca8ac53a…, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

Questions this record answers

Each answer is composed only from fields this record carries, and names the attestation for what it says. A question the record cannot answer from its own attested content is not asked here. Where a boundary is described as official it was promulgated by an authority with the power to draw it and is not amended by anything on the vernacular layer; where it is described as vernacular it is held by attestation alone and amends no official boundary.

Who publishes Boston Street Segments (SAM System), and under what license?

Boston Maps publishes it. The archive accessioned it under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0 (public domain), and holds the publisher's own column dictionary verbatim rather than reworded into the archive's vocabulary — how a publisher names a column is evidence about the publisher.