EPSG:2446 JGD2000 / Japan Plane Rectangular CS IV

Projected system (Transverse Mercator) in use: Japan - zone IV. The full definition below, and conversion in one click.

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System record
Code	EPSG:2446
Name	JGD2000 / Japan Plane Rectangular CS IV
Type	Projected system — Transverse Mercator
Area of use	Japan - zone IV Japan - onshore - Shikoku - Kagawa-ken; Ehime-ken; Tokushima-ken; Kochi-ken.
Bounds	W 131,95° · S 32,69° · E 134,81° · N 34,45°
Countries	Japan
Datum	Japanese Geodetic Datum 2000
Ellipsoid	GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system	EPSG:4612 — JGD2000
Unit	metre (X north, Y east)
Transformation to WGS 84	JGD2000 to WGS 84 (1) (EPSG:1826) — accuracy 1 m
Scope	Cadastre, engineering survey, topographic mapping (large and medium scale).

Projection parameters

Parameter	Value	Unit
Latitude of natural origin	33	degree
Longitude of natural origin	133.5	degree
Scale factor at natural origin	0.9999	unity
False easting	0	metre
False northing	0	metre

proj4 definition

+proj=tmerc +lat_0=33 +lon_0=133.5 +k=0.9999 +x_0=0 +y_0=0 +ellps=GRS80 +units=m +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:2446.

WKT (ESRI format, the .prj content)

PROJCS["JGD_2000_Japan_Zone_4",GEOGCS["GCS_JGD_2000",DATUM["D_JGD_2000",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",133.5],PARAMETER["Scale_Factor",0.9999],PARAMETER["Latitude_Of_Origin",33.0],UNIT["Meter",1.0]]

All systems — Japan

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

Projection parameters

proj4 definition

WKT (ESRI format, the .prj content)

Other systems — Japan