EPSG:26731 NAD27 / Alaska zone 1
Projected system (Hotine Oblique Mercator (variant A)) in use: USA - Alaska - Panhandle. The full definition below, and conversion in one click.
| Code | EPSG:26731 |
|---|---|
| Name | NAD27 / Alaska zone 1 |
| Type | Projected system — Hotine Oblique Mercator (variant A) |
| Area of use |
USA - Alaska - Panhandle United States (USA) - Alaska - east of 141°W; i.e. Panhandle. |
| Bounds | W -141,00° · S 54,61° · E -129,99° · N 60,35° |
| 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 | US survey foot (X east, Y north) |
| Transformation to WGS 84 | NAD27 to WGS 84 (7) (EPSG:1176) — accuracy 12 m |
| Scope | Engineering survey, topographic mapping. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of projection centre | 57 | degree |
| Longitude of projection centre | -133.66666666666666 | degree |
| Azimuth at projection centre | 323.13010236111114 | degree |
| Angle from Rectified to Skew Grid | 323.13010236111114 | degree |
| Scale factor at projection centre | 0.9999 | unity |
| False easting | 16404166.67 | US survey foot |
| False northing | -16404166.67 | US survey foot |
proj4 definition
+proj=omerc +no_uoff +lat_0=57 +lonc=-133.666666666667 +alpha=323.130102361111 +gamma=323.130102361111 +k=0.9999 +x_0=5000000.001016 +y_0=-5000000.001016 +a=6378206.4000000004 +rf=294.9786982139 +units=us-ft +towgs84=-5,135,172 +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:26731.
WKT (ESRI format, the .prj content)
PROJCS["NAD_1927_StatePlane_Alaska_1_FIPS_5001",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["Hotine_Oblique_Mercator_Azimuth_Natural_Origin"],PARAMETER["False_Easting",16404166.67],PARAMETER["False_Northing",-16404166.67],PARAMETER["Scale_Factor",0.9999],PARAMETER["Azimuth",-36.8698976388889],PARAMETER["Longitude_Of_Center",-133.666666666667],PARAMETER["Latitude_Of_Center",57.0],UNIT["US survey foot",0.304800609601219]]Other systems — United States
- EPSG:26719NAD27 / UTM zone 19N
- EPSG:26720NAD27 / UTM zone 20N
- EPSG:26729NAD27 / Alabama East
- EPSG:26730NAD27 / Alabama West
- EPSG:26732NAD27 / Alaska zone 2
- EPSG:26733NAD27 / Alaska zone 3
- EPSG:26734NAD27 / Alaska zone 4
- EPSG:26735NAD27 / Alaska zone 5
- EPSG:26736NAD27 / Alaska zone 6
- EPSG:26737NAD27 / Alaska zone 7
- EPSG:26738NAD27 / Alaska zone 8
- EPSG:26739NAD27 / Alaska zone 9
- EPSG:26740NAD27 / Alaska zone 10
- EPSG:26741NAD27 / California zone I
- EPSG:26742NAD27 / California zone II
- EPSG:26743NAD27 / California zone III
- EPSG:26744NAD27 / California zone IV
- EPSG:26745NAD27 / California zone V
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.