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EPSG Library · Americas and Asia-Pacific

EPSG:6677 — JGD2011 / Japan Plane Rectangular CS IX

Source: EPSG Dataset via PROJ 9.5.1 · Updated

Summary

EPSG:6677 (JGD2011 / Japan Plane Rectangular CS IX) is a projected coordinate reference system on the Japanese Geodetic Datum 2011 datum using the Transverse Mercator method, with coordinates in metres. Area of use: Japan - onshore - Honshu - Tokyo-to.

  • Type: projected
  • Datum: Japanese Geodetic Datum 2011
  • Units: metre
  • Axes: X, Y

Definition

EPSG:6677 as published in the EPSG Dataset (PROJ 9.5.1).
PropertyValue
EPSG codeEPSG:6677
NameJGD2011 / Japan Plane Rectangular CS IX
TypeProjected CRS
DatumJapanese Geodetic Datum 2011
EllipsoidGRS 1980 (a = 6,378,137.000 m, 1/f = 298.257222)
Prime meridianGreenwich
Projection methodTransverse Mercator
AxesNorthing (X, north, metre); Easting (Y, east, metre)
ScopeCadastre, engineering survey, topographic mapping (large and medium scale).
Bounding box138.4° to 141.11° longitude, 29.31° to 37.98° latitude

Area of use

Japan - onshore - Honshu - Tokyo-to. (Excludes offshore island areas of Tokyo-to covered by Japan Plane Rectangular Coordinate System zones XIV, XVIII and XIX).

Projection parameters

Transverse Mercator parameters.
ParameterValueUnit
Latitude of natural origin36degree
Longitude of natural origin139.8333333degree
Scale factor at natural origin0.9999unity
False easting0metre
False northing0metre

Example coordinates

A WGS 84 point at longitude 139.755°, latitude 33.645° (inside the area of use) has these coordinates in EPSG:6677:

Computed with PROJ using the EPSG default operation: axis order change (2D) + Inverse of JGD2011 to WGS 84 (1) + Japan Plane Rectangular CS zone IX + axis order change (2D).
AxisValueUnit
X-7,266.048m
Y-261,228.661m

At this point the projection scale factor is 0.99990065 and the grid convergence is -0.043400°.

Open this conversion in the coordinate converter

Transformations to WGS 84

Candidate operations from the EPSG Dataset, best first as ranked by PROJ.
OperationAccuracyArea of use
axis order change (2D) + JGD2011 to WGS 84 (1) + axis order change (2D)1 mJapan - onshore and offshore.

Transformations change the datum, so each has an accuracy and an area of use. Choose the most accurate one that covers your data and record its name. See datum transformations.

Definitions and downloads

PROJ string

+proj=tmerc +lat_0=36 +lon_0=139.833333333333 +k=0.9999 +x_0=0 +y_0=0 +ellps=GRS80 +units=m +no_defs +type=crs

A PROJ string cannot carry every EPSG detail (axis order, datum ensemble, transformations). Prefer WKT2 or the EPSG code itself.

Proj4js definition used by the converter

+proj=tmerc +lat_0=36 +lon_0=139.833333333333 +k=0.9999 +x_0=0 +y_0=0 +ellps=GRS80 +units=m +towgs84=0,0,0 +no_defs

Datum shift from JGD2011 to WGS 84 (1) (EPSG accuracy 1 m), the best single Helmert operation for this area of use. Where PROJ prefers a grid-based or multi-step operation (see the table above), results can differ by up to that operation's accuracy.

WKT2:2019
PROJCRS["JGD2011 / Japan Plane Rectangular CS IX", BASEGEOGCRS["JGD2011", DATUM["Japanese Geodetic Datum 2011", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",6668]], CONVERSION["Japan Plane Rectangular CS zone IX", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",36, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",139.833333333333, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.9999, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",0, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",0, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["northing (X)",north, ORDER[1], LENGTHUNIT["metre",1]], AXIS["easting (Y)",east, ORDER[2], LENGTHUNIT["metre",1]], USAGE[ SCOPE["Cadastre, engineering survey, topographic mapping (large and medium scale)."], AREA["Japan - onshore - Honshu - Tokyo-to. (Excludes offshore island areas of Tokyo-to covered by Japan Plane Rectangular Coordinate System zones XIV, XVIII and XIX)."], BBOX[29.31,138.4,37.98,141.11]], ID["EPSG",6677]]

Downloads

FAQ

What is EPSG:6677?

EPSG:6677 (JGD2011 / Japan Plane Rectangular CS IX) is a projected coordinate reference system on the Japanese Geodetic Datum 2011 datum using the Transverse Mercator method, with coordinates in metres. Area of use: Japan - onshore - Honshu - Tokyo-to.

Where can EPSG:6677 be used?

Its area of use is: Japan - onshore - Honshu - Tokyo-to. (Excludes offshore island areas of Tokyo-to covered by Japan Plane Rectangular Coordinate System zones XIV, XVIII and XIX).

Is EPSG:6677 in metres or degrees?

EPSG:6677 is projected, so coordinates are northing and easting in metres, not degrees.

How do I convert EPSG:6677 to latitude and longitude?

Transform from EPSG:6677 to EPSG:4326 (WGS 84). In GeoCAD Bridge open the coordinate converter with EPSG:6677 preselected, enter easting and northing, and choose WGS 84 as the target.

How accurate is the transformation from EPSG:6677 to WGS 84?

The most accurate EPSG transformation listed here is “axis order change (2D) + JGD2011 to WGS 84 (1) + axis order change (2D)”, with a stated accuracy of 1 m for Japan - onshore and offshore.. Always check the area of use before applying it.

Coordinate systems

Articles

Tools

References

  1. IOGP. EPSG Geodetic Parameter Dataset, epsg.org/crs_6677.
  2. PROJ 9.5.1 / pyproj 3.7.2, used to compute every value on this page.

Cite this page

GeoCAD Bridge. “EPSG:6677 — JGD2011 / Japan Plane Rectangular CS IX.” GeoCAD Bridge EPSG Library, updated 2026-10-05. https://www.geocadbridge.com/epsg/6677/