EPSG:26781 NAD27 / Louisiana North
Système projeté (Lambert Conic Conformal (2SP)) en usage : USA - Louisiana - SPCS - N. La définition complète ci-dessous, et la conversion en un clic.
| Code | EPSG:26781 |
|---|---|
| Nom | NAD27 / Louisiana North |
| Type | Système projeté — Lambert Conic Conformal (2SP) |
| Zone d'usage |
USA - Louisiana - SPCS - N United States (USA) - Louisiana - counties of Avoyelles; Bienville; Bossier; Caddo; Caldwell; Catahoula; Claiborne; Concordia; De Soto; East Carroll; Franklin; Grant; Jackson; La Salle; Lincoln; Madison; Morehouse; Natchitoches; Ouachita; Rapides; Red River; Richland; Sabine; Tensas; Union; Vernon; Webster; West Carroll; Winn. |
| Emprise | O -94,05° · S 30,85° · E -90,86° · N 33,03° |
| Pays | États-Unis |
| Datum | North American Datum 1927 |
| Ellipsoïde | Clarke 1866 a = 6378206.4 m · 1/f = 294.978698214 |
| Système géographique de base | EPSG:4267 — NAD27 |
| Unité | US survey foot (X east, Y north) |
| Transformation vers WGS 84 | NAD27 to WGS 84 (6) (EPSG:1175) — précision 7 m |
| Usage | Engineering survey, topographic mapping. |
Paramètres de la projection
| Paramètre | Valeur | Unité |
|---|---|---|
| Latitude of false origin | 30.666666666666668 | degree |
| Longitude of false origin | -92.5 | degree |
| Latitude of 1st standard parallel | 31.166666666666668 | degree |
| Latitude of 2nd standard parallel | 32.666666666666664 | degree |
| Easting at false origin | 2000000 | US survey foot |
| Northing at false origin | 0 | US survey foot |
Définition proj4
+proj=lcc +lat_0=30.6666666666667 +lon_0=-92.5 +lat_1=31.1666666666667 +lat_2=32.6666666666667 +x_0=609601.219202438 +y_0=0 +a=6378206.4000000004 +rf=294.9786982139 +units=us-ft +towgs84=-8,159,175 +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:26781.
WKT (format ESRI, contenu du .prj)
PROJCS["NAD_1927_StatePlane_Louisiana_North_FIPS_1701",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",2000000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-92.5],PARAMETER["Standard_Parallel_1",31.1666666666667],PARAMETER["Standard_Parallel_2",32.6666666666667],PARAMETER["Latitude_Of_Origin",30.6666666666667],UNIT["US survey foot",0.304800609601219]]Autres systèmes — États-Unis
- EPSG:26770NAD27 / Idaho West
- EPSG:26771NAD27 / Illinois East
- EPSG:26772NAD27 / Illinois West
- EPSG:26773NAD27 / Indiana East
- EPSG:26774NAD27 / Indiana West
- EPSG:26775NAD27 / Iowa North
- EPSG:26776NAD27 / Iowa South
- EPSG:26777NAD27 / Kansas North
- EPSG:26778NAD27 / Kansas South
- EPSG:26779NAD27 / Kentucky North
- EPSG:26780NAD27 / Kentucky South
- EPSG:26782NAD27 / Louisiana South
- EPSG:26783NAD27 / Maine East
- EPSG:26784NAD27 / Maine West
- EPSG:26785NAD27 / Maryland
- EPSG:26786NAD27 / Massachusetts Mainland
- EPSG:26787NAD27 / Massachusetts Island
- EPSG:26791NAD27 / Minnesota North
Source : registre EPSG v11.022 (IOGP), via la base PROJ. Vérifiez toujours un code sur epsg.org avant un travail contractuel.