EPSG:26718 NAD27 / UTM zone 18N
Projected system (Transverse Mercator) in use: North America - 78°W to 72°W and NAD27 by country. The full definition below, and conversion in one click.
| Code | EPSG:26718 |
|---|---|
| Name | NAD27 / UTM zone 18N |
| Type | Projected system — Transverse Mercator |
| Area of use |
North America - 78°W to 72°W and NAD27 by country North America - between 78°W and 72°W. Bahamas. Canada - Nunavut; Ontario; Quebec. Cuba. United States (USA) - Connecticut; Delaware; Maryland; Massachusetts; New Hampshire; New Jersey; New York; North Carolina; Pennsylvania; Virginia; Vermont. Onshore for Canadian arctic. onshore and offshore for US east coast and Cuba, with usage in Bahamas onshore plus offshore over internal continental shelf only. |
| Bounds | W -78,00° · S 18,83° · E -72,00° · N 83,16° |
| Also covers | Bahamas, Canada, Cuba, United States, Jersey |
| Datum | North 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 |
| Scope | Engineering survey, topographic mapping. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 0 | degree |
| Longitude of natural origin | -75 | degree |
| Scale factor at natural origin | 0.9996 | unity |
| False easting | 500000 | metre |
| False northing | 0 | metre |
proj4 definition
+proj=utm +zone=18 +a=6378206.4000000004 +rf=294.9786982139 +units=m +towgs84=-10,158,187 +no_defsPaste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:26718.
WKT (ESRI format, the .prj content)
PROJCS["NAD_1927_UTM_Zone_18N",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",-75.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.