EPSG:29168 SAD69 / UTM zone 18N
Système projeté (Transverse Mercator) en usage : South America - 78°W to 72°W, N hemisphere and SAD69 by country. La définition complète ci-dessous, et la conversion en un clic.
| Code | EPSG:29168 |
|---|---|
| Nom | SAD69 / UTM zone 18N |
| Type | Système projeté — Transverse Mercator |
| Zone d'usage |
South America - 78°W to 72°W, N hemisphere and SAD69 by country South America between 78°W and 72°W, northern hemisphere, onshore. |
| Emprise | O -78,00° · S 0,00° · E -72,00° · N 12,31° |
| Pays | Monde |
| Datum | South American Datum 1969 |
| Ellipsoïde | GRS 1967 Modified a = 6378160 m · 1/f = 298.25 |
| Système géographique de base | EPSG:4618 — SAD69 |
| Unité | metre (E east, N north) |
| Transformation vers WGS 84 | SAD69 to WGS 84 (6) (EPSG:1869) — précision 10 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 +ellps=aust_SA +units=m +towgs84=-44,6,-36 +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:29168.
WKT (format ESRI, contenu du .prj)
PROJCS["SAD_1969_UTM_Zone_18N",GEOGCS["GCS_South_American_1969",DATUM["D_South_American_1969",SPHEROID["GRS_1967_Truncated",6378160.0,298.25]],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]]Autres systèmes — Monde
- EPSG:27701WGS 84 / Equi7 Africa
- EPSG:27706WGS 84 / Equi7 Oceania
- EPSG:29169SAD69 / UTM zone 19N
- EPSG:29170SAD69 / UTM zone 20N
- EPSG:29171SAD69 / UTM zone 21N
- EPSG:29187SAD69 / UTM zone 17S
- EPSG:31965SIRGAS 2000 / UTM zone 11N
- EPSG:31966SIRGAS 2000 / UTM zone 12N
- EPSG:31967SIRGAS 2000 / UTM zone 13N
- EPSG:31968SIRGAS 2000 / UTM zone 14N
- EPSG:31969SIRGAS 2000 / UTM zone 15N
- EPSG:31970SIRGAS 2000 / UTM zone 16N
- EPSG:31971SIRGAS 2000 / UTM zone 17N
- EPSG:31972SIRGAS 2000 / UTM zone 18N
- EPSG:31973SIRGAS 2000 / UTM zone 19N
- EPSG:31974SIRGAS 2000 / UTM zone 20N
- EPSG:31975SIRGAS 2000 / UTM zone 21N
- EPSG:31977SIRGAS 2000 / UTM zone 17S
Source : registre EPSG v11.022 (IOGP), via la base PROJ. Vérifiez toujours un code sur epsg.org avant un travail contractuel.