EPSG systems

EPSG:6628 NAD83(PA11) / Hawaii zone 1

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

EPSG publishes no simple transformation to WGS 84 for this datum: conversion works on the ellipsoid alone and can be off by tens of metres.

System record
CodeEPSG:6628
NameNAD83(PA11) / 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
DatumNAD83 (National Spatial Reference System PA11)
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:6322 — NAD83(PA11)
Unit metre (X east, Y north)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
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 easting500000metre
False northing0metre

proj4 definition

+proj=tmerc +lat_0=18.8333333333333 +lon_0=-155.5 +k=0.999966667 +x_0=500000 +y_0=0 +ellps=GRS80 +units=m +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:6628.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1983_PA11_StatePlane_Hawaii_1_FIPS_5101",GEOGCS["GCS_NAD_1983_PA11",DATUM["D_NAD_1983_PA11",SPHEROID["GRS_1980",6378137.0,298.257222101]],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["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.