EPSG:9311 NAD27 / US National Atlas Equal Area
Projected system (Lambert Azimuthal Equal Area (Spherical)) in use: USA. The full definition below, and conversion in one click.
| Code | EPSG:9311 |
|---|---|
| Name | NAD27 / US National Atlas Equal Area |
| Type | Projected system — Lambert Azimuthal Equal Area (Spherical) |
| Area of use |
USA United States (USA) - onshore and offshore. |
| Bounds | W 167,65° · S 15,56° · E -65,69° · N 74,71° |
| Countries | United States |
| Datum | North American Datum 1927 |
| Ellipsoid | Clarke 1866 a = 6378206.4 m · 1/f = 294.978698214 |
| Base geographic system | EPSG:4267 — NAD27 |
| Unit | metre (X east, Y north) |
| Transformation to WGS 84 | NAD27 to WGS 84 (3) (EPSG:1172) — accuracy 20 m |
| Scope | Statistical analysis. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 45 | degree |
| Longitude of natural origin | -100 | degree |
| False easting | 0 | metre |
| False northing | 0 | metre |
proj4 definition
+proj=laea +R_A +lat_0=45 +lon_0=-100 +x_0=0 +y_0=0 +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:9311.
WKT (ESRI format, the .prj content)
PROJCS["NAD27_US_National_Atlas_Equal_Area",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_Azimuthal_Equal_Area"],PARAMETER["latitude_of_center",45.0],PARAMETER["longitude_of_center",-100.0],PARAMETER["false_easting",0.0],PARAMETER["false_northing",0.0],UNIT["Meter",1.0]]Other systems — United States
- EPSG:8526NAD83(2011) / KS RCS zone 9
- EPSG:8527NAD83(2011) / KS RCS zone 10
- EPSG:8528NAD83(2011) / KS RCS zone 11
- EPSG:8529NAD83(2011) / KS RCS zone 12
- EPSG:8531NAD83(2011) / KS RCS zone 13
- EPSG:8533NAD83(2011) / KS RCS zone 14
- EPSG:8534NAD83(2011) / KS RCS zone 15
- EPSG:8535NAD83(2011) / KS RCS zone 16
- EPSG:8536NAD83(2011) / KS RCS zone 17
- EPSG:8538NAD83(2011) / KS RCS zone 18
- EPSG:8539NAD83(2011) / KS RCS zone 19
- EPSG:8540NAD83(2011) / KS RCS zone 20
- EPSG:8826NAD83 / Idaho Transverse Mercator
- EPSG:8860NAD83(FBN)
- EPSG:9075NAD83(PACP00)
- EPSG:9674NAD83 / USFS R6 Albers
- EPSG:9748NAD83(2011) / Alabama East (ftUS)
- EPSG:9749NAD83(2011) / Alabama West (ftUS)
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.