EPSG systems

EPSG:26711 NAD27 / UTM zone 11N

Projected system (Transverse Mercator) in use: North America - 120°W to 114°W and NAD27 by country - onshore. The full definition below, and conversion in one click.

System record
CodeEPSG:26711
NameNAD27 / UTM zone 11N
TypeProjected system — Transverse Mercator
Area of use North America - 120°W to 114°W and NAD27 by country - onshore
North America - between 120°W and 114°W - onshore. Canada - Alberta; British Columbia; Northwest Territories; Nunavut. Mexico. United States (USA) - California; Idaho; Nevada; Oregon; Washington.
Bounds W -120,00° · S 26,93° · E -114,00° · N 78,13°
Countries Canada, Mexico, United States
DatumNorth American Datum 1927
Ellipsoid Clarke 1866 a = 6378206.4 m · 1/f = 294.978698214
Base geographic system EPSG:4267 — NAD27
Unit metre (E east, N north)
Transformation to WGS 84 NAD27 to WGS 84 (3) (EPSG:1172) — accuracy 20 m
ScopeEngineering survey, topographic mapping.

Projection parameters

ParameterValueUnit
Latitude of natural origin0degree
Longitude of natural origin-117degree
Scale factor at natural origin0.9996unity
False easting500000metre
False northing0metre

proj4 definition

+proj=utm +zone=11 +a=6378206.4000000004 +rf=294.9786982139 +units=m +towgs84=-10,158,187 +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:26711.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1927_UTM_Zone_11N",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["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-117.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

All systems — Canada

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