EPSG systems

EPSG:3561 Old Hawaiian / Hawaii zone 1

Projected system (Transverse Mercator) in use: USA - Hawaii - island of Hawaii - onshore. The full definition below, and conversion in one click.

System record
CodeEPSG:3561
NameOld Hawaiian / Hawaii zone 1
TypeProjected system — Transverse Mercator
Area of use USA - Hawaii - island of Hawaii - onshore
United States (USA) - Hawaii - island of Hawaii - onshore.
Bounds W -156,10° · S 18,87° · E -154,74° · N 20,33°
Countries United States
DatumOld Hawaiian
Ellipsoid Clarke 1866 a = 6378206.4 m · 1/f = 294.978698214
Base geographic system EPSG:4135 — Old Hawaiian
Unit US survey foot (X east, Y north)
Transformation to WGS 84 Old Hawaiian to WGS 84 (3) (EPSG:15824) — accuracy 38 m
ScopeEngineering survey, topographic mapping.

Projection parameters

ParameterValueUnit
Latitude of natural origin18.833333333333332degree
Longitude of natural origin-155.5degree
Scale factor at natural origin0.999966667unity
False easting500000US survey foot
False northing0US survey foot

proj4 definition

+proj=tmerc +lat_0=18.8333333333333 +lon_0=-155.5 +k=0.999966667 +x_0=152400.30480061 +y_0=0 +ellps=clrk66 +units=us-ft +towgs84=61,-285,-181 +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:3561.

WKT (ESRI format, the .prj content)

PROJCS["Old_Hawaiian_StatePlane_Hawaii_1_FIPS_5101",GEOGCS["GCS_Old_Hawaiian",DATUM["D_Old_Hawaiian",SPHEROID["Clarke_1866",6378206.4,294.978698213898]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-155.5],PARAMETER["Scale_Factor",0.999966667],PARAMETER["Latitude_Of_Origin",18.8333333333333],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.