EPSG systems

EPSG:23302 NAD83(2011) / ICS83-Rockford (ftUS)

Projected system (Transverse Mercator) in use: USA - Illinois - Lee, Ogle, Winnebago. The full definition below, and conversion in one click.

System record
CodeEPSG:23302
NameNAD83(2011) / ICS83-Rockford (ftUS)
TypeProjected system — Transverse Mercator
Area of use USA - Illinois - Lee, Ogle, Winnebago
United States (USA) - Illinois - counties of Lee, Ogle and Winnebago.
Bounds W -89,69° · S 41,58° · E -88,93° · N 42,51°
Countries United States
DatumNAD83 (National Spatial Reference System 2011)
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:6318 — NAD83(2011)
Unit US survey foot (N north, E east)
Transformation to WGS 84 NAD83(2011) to WGS 84 (1) (EPSG:9774) — accuracy 2 m
ScopeEngineering survey, topographic mapping (large and medium scale).

Projection parameters

ParameterValueUnit
Latitude of natural origin41.25degree
Longitude of natural origin-89.25degree
Scale factor at natural origin1.000029unity
False easting2822000US survey foot
False northing492000US survey foot

proj4 definition

+proj=tmerc +lat_0=41.25 +lon_0=-89.25 +k=1.000029 +x_0=860147.320294641 +y_0=149961.8999238 +ellps=GRS80 +units=us-ft +towgs84=0,0,0 +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:23302.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1983_(2011)_ICS_Rockford_(US_Feet)",GEOGCS["GCS_NAD_1983_2011",DATUM["D_NAD_1983_2011",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",2822000.0],PARAMETER["False_Northing",492000.0],PARAMETER["Central_Meridian",-89.25],PARAMETER["Scale_Factor",1.000029],PARAMETER["Latitude_Of_Origin",41.25],UNIT["US survey foot",0.304800609601219]]

All systems — United States

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