EPSG:2231 NAD83 / Colorado North (ftUS)
Projected system (Lambert Conic Conformal (2SP)) in use: USA - Colorado - SPCS - N. The full definition below, and conversion in one click.
| Code | EPSG:2231 |
|---|---|
| Name | NAD83 / Colorado North (ftUS) |
| Type | Projected system — Lambert Conic Conformal (2SP) |
| Area of use |
USA - Colorado - SPCS - N United States (USA) - Colorado - counties Adams; Boulder; Gilpin; Grand; Jackson; Larimer; Logan; Moffat; Morgan; Phillips; Rio Blanco; Routt; Sedgwick; Washington; Weld; Yuma. |
| Bounds | W -109,06° · S 39,56° · E -102,04° · N 41,01° |
| Countries | United States |
| Datum | North American Datum 1983 |
| Ellipsoid | GRS 1980 a = 6378137 m · 1/f = 298.257222101 |
| Base geographic system | EPSG:4269 — NAD83 |
| Unit | US survey foot (X east, Y north) |
| Transformation to WGS 84 | NAD83 to WGS 84 (1) (EPSG:1188) — accuracy 4 m |
| Scope | Engineering survey, topographic mapping. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of false origin | 39.333333333333336 | degree |
| Longitude of false origin | -105.5 | degree |
| Latitude of 1st standard parallel | 40.78333333333333 | degree |
| Latitude of 2nd standard parallel | 39.71666666666667 | degree |
| Easting at false origin | 3000000 | US survey foot |
| Northing at false origin | 1000000 | US survey foot |
proj4 definition
+proj=lcc +lat_0=39.3333333333333 +lon_0=-105.5 +lat_1=40.7833333333333 +lat_2=39.7166666666667 +x_0=914401.828803658 +y_0=304800.609601219 +a=6378137 +rf=298.257222101 +units=us-ft +towgs84=0,0,0 +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:2231.
WKT (ESRI format, the .prj content)
PROJCS["NAD_1983_StatePlane_Colorado_North_FIPS_0501_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",3000000.0],PARAMETER["False_Northing",1000000.0],PARAMETER["Central_Meridian",-105.5],PARAMETER["Standard_Parallel_1",40.7833333333333],PARAMETER["Standard_Parallel_2",39.7166666666667],PARAMETER["Latitude_Of_Origin",39.3333333333333],UNIT["US survey foot",0.304800609601219]]Other systems — United States
- EPSG:2222NAD83 / Arizona East (ft)
- EPSG:2223NAD83 / Arizona Central (ft)
- EPSG:2224NAD83 / Arizona West (ft)
- EPSG:2225NAD83 / California zone 1 (ftUS)
- EPSG:2226NAD83 / California zone 2 (ftUS)
- EPSG:2227NAD83 / California zone 3 (ftUS)
- EPSG:2228NAD83 / California zone 4 (ftUS)
- EPSG:2229NAD83 / California zone 5 (ftUS)
- EPSG:2230NAD83 / California zone 6 (ftUS)
- EPSG:2232NAD83 / Colorado Central (ftUS)
- EPSG:2233NAD83 / Colorado South (ftUS)
- EPSG:2234NAD83 / Connecticut (ftUS)
- EPSG:2235NAD83 / Delaware (ftUS)
- EPSG:2236NAD83 / Florida East (ftUS)
- EPSG:2237NAD83 / Florida West (ftUS)
- EPSG:2238NAD83 / Florida North (ftUS)
- EPSG:2239NAD83 / Georgia East (ftUS)
- EPSG:2240NAD83 / Georgia West (ftUS)
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.