EPSG systems

EPSG:8181 NAD83(HARN) / WISCRS Douglas (m)

Projected system (Transverse Mercator) in use: USA - Wisconsin - Douglas. The full definition below, and conversion in one click.

System record
CodeEPSG:8181
NameNAD83(HARN) / WISCRS Douglas (m)
TypeProjected system — Transverse Mercator
Area of use USA - Wisconsin - Douglas
United States (USA) - Wisconsin - Douglas county.
Bounds W -92,30° · S 46,15° · E -91,55° · N 46,76°
Countries United States
DatumNAD83 (High Accuracy Reference Network)
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:4152 — NAD83(HARN)
Unit metre (X east, Y north)
Transformation to WGS 84 NAD83(HARN) to WGS 84 (3) (EPSG:1901) — accuracy 1 m
ScopeEngineering survey.

Projection parameters

ParameterValueUnit
Latitude of natural origin45.88333333333333degree
Longitude of natural origin-91.91666666666667degree
Scale factor at natural origin1.0000385418unity
False easting59131.3183metre
False northing0.0041metre

proj4 definition

+proj=tmerc +lat_0=45.8833333333333 +lon_0=-91.9166666666667 +k=1.0000385418 +x_0=59131.3183 +y_0=0.0041 +ellps=GRS80 +units=m +towgs84=-0.991,1.9072,0.5129,0.02579,0.00965,0.01166,0 +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:8181.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1983_HARN_WISCRS_Douglas_County_Meters",GEOGCS["GCS_North_American_1983_HARN",DATUM["D_North_American_1983_HARN",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",59131.3183],PARAMETER["False_Northing",0.0041],PARAMETER["Central_Meridian",-91.9166666666667],PARAMETER["Scale_Factor",1.0000385418],PARAMETER["Latitude_Of_Origin",45.8833333333333],UNIT["Meter",1.0]]

All systems — United States

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.