EPSG:26718 NAD27 / UTM zone 18N
Système projeté (Transverse Mercator) en usage : North America - 78°W to 72°W and NAD27 by country. La définition complète ci-dessous, et la conversion en un clic.
| Code | EPSG:26718 |
|---|---|
| Nom | NAD27 / UTM zone 18N |
| Type | Système projeté — Transverse Mercator |
| Zone d'usage |
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. |
| Emprise | O -78,00° · S 18,83° · E -72,00° · N 83,16° |
| Couvre aussi | Bahamas, Canada, Cuba, États-Unis, Jersey |
| Datum | North American Datum 1927 |
| Ellipsoïde | Clarke 1866 a = 6378206.4 m · 1/f = 294.978698214 |
| Système géographique de base | EPSG:4267 — NAD27 |
| Unité | metre (E east, N north) |
| Transformation vers WGS 84 | NAD27 to WGS 84 (3) (EPSG:1172) — précision 20 m |
| Usage | Engineering survey, topographic mapping. |
Paramètres de la projection
| Paramètre | Valeur | Unité |
|---|---|---|
| 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 |
Définition proj4
+proj=utm +zone=18 +a=6378206.4000000004 +rf=294.9786982139 +units=m +towgs84=-10,158,187 +no_defsÀ coller dans QGIS, proj4js, PostGIS (spatial_ref_sys) ou GDAL. +towgs84 porte la transformation EPSG vers WGS 84 ; le code officiel reste EPSG:26718.
WKT (format ESRI, contenu du .prj)
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 : registre EPSG v11.022 (IOGP), via la base PROJ. Vérifiez toujours un code sur epsg.org avant un travail contractuel.