EPSG systems

EPSG:26786 NAD27 / Massachusetts Mainland

Projected system (Lambert Conic Conformal (2SP)) in use: USA - Massachusetts - SPCS - mainland. The full definition below, and conversion in one click.

System record
CodeEPSG:26786
NameNAD27 / Massachusetts Mainland
TypeProjected system — Lambert Conic Conformal (2SP)
Area of use USA - Massachusetts - SPCS - mainland
United States (USA) - Massachusetts onshore - counties of Barnstable; Berkshire; Bristol; Essex; Franklin; Hampden; Hampshire; Middlesex; Norfolk; Plymouth; Suffolk; Worcester.
Bounds W -73,50° · S 41,46° · E -69,86° · N 42,89°
Countries United States
DatumNorth American Datum 1927
Ellipsoid Clarke 1866 a = 6378206.4 m · 1/f = 294.978698214
Base geographic system EPSG:4267 — NAD27
Unit US survey foot (X east, Y north)
Transformation to WGS 84 NAD27 to WGS 84 (4) (EPSG:1173) — accuracy 10 m
ScopeEngineering survey, topographic mapping.

Projection parameters

ParameterValueUnit
Latitude of false origin41degree
Longitude of false origin-71.5degree
Latitude of 1st standard parallel41.71666666666667degree
Latitude of 2nd standard parallel42.68333333333333degree
Easting at false origin600000US survey foot
Northing at false origin0US survey foot

proj4 definition

+proj=lcc +lat_0=41 +lon_0=-71.5 +lat_1=41.7166666666667 +lat_2=42.6833333333333 +x_0=182880.365760732 +y_0=0 +a=6378206.4000000004 +rf=294.9786982139 +units=us-ft +towgs84=-8,160,176 +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:26786.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1927_StatePlane_Massachusetts_Mainland_FIPS_2001",GEOGCS["GCS_North_American_1927",DATUM["D_North_American_1927",SPHEROID["Clarke_1866",6378206.4,294.978698213898]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",600000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-71.5],PARAMETER["Standard_Parallel_1",41.7166666666667],PARAMETER["Standard_Parallel_2",42.6833333333333],PARAMETER["Latitude_Of_Origin",41.0],UNIT["US survey foot",0.304800609601219]]

All systems — United States

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.