LatLong Converter

JGD2000 to WGS84 Converter

JGD2000
WGS84
JGD2000
WGS84

About JGD2000 Coordinate System

1Definition

JGD2000 was Japan's national geodetic system before the 2011 earthquake, based on ITRF94 and the GRS80 ellipsoid.

2Development History

JGD2000 replaced the Tokyo Datum in 2002, modernizing Japan's surveying infrastructure with GPS-compatible coordinates.

3Applications

JGD2000 is still used for legacy data and some pre-2011 mapping projects in Japan.

Tokyo Datum Replacement

JGD2000 replaced the older Tokyo Datum, which had offsets of up to 450 meters from GPS coordinates.

ITRF94 Basis

JGD2000 is based on the International Terrestrial Reference Frame 1994 (ITRF94).

About WGS84 Coordinate System

1Definition

WGS84 (World Geodetic System 1984) is the global standard geodetic reference system used by GPS. It defines an Earth-centered, Earth-fixed coordinate system and geodetic datum.

2Development History

Developed by the U.S. Department of Defense in 1984, WGS84 has undergone several refinements (WGS84(G730), WGS84(G873), WGS84(G1150), WGS84(G1762)) to improve accuracy through GPS satellite observations.

3Applications

WGS84 is the default coordinate system for GPS receivers worldwide. It is used in aviation, maritime navigation, Google Maps, OpenStreetMap, GIS applications, and scientific research.

GPS Compatibility

WGS84 is the native coordinate system of the Global Positioning System (GPS), ensuring direct compatibility with all GPS receivers and satellite navigation systems worldwide.

Global Standard

As the most widely adopted geodetic datum, WGS84 provides a consistent global reference frame for mapping, surveying, and geospatial data exchange across international boundaries.

High Precision

With continuous refinements, WGS84 achieves centimeter-level accuracy globally, making it suitable for high-precision applications like surveying, drone navigation, and scientific research.

JGD2000 to WGS84 Conversion Guide

📐 Conversion Formula
// JGD2000 → WGS84 (Japanese datum shift)
// Uses a simple 3-parameter geocentric translation

// Step 1: Geodetic → Cartesian (GRS80 ellipsoid)
X = (N + h) × cos(φ) × cos(λ)
Y = (N + h) × cos(φ) × sin(λ)
Z = (N × (1 - e²) + h) × sin(φ)

// Step 2: Apply datum shift
// Parameters: ΔX = -146.414, 507.337, 681.921 (meters)
X' = X + ΔX
Y' = Y + ΔY
Z' = Z + ΔZ

// Step 3: Cartesian → Geodetic (GRS80 ellipsoid)
// Iterative calculation for latitude
p = √(X'² + Y'²)
θ = atan2(Z' × a, p × (1 - f))
φ' = atan2(Z' + e² × (1 - f) × a × sin³(θ), p - e² × a × cos³(θ))
λ' = atan2(Y', X')

Japanese datum transformations (JGD2000, JGD2011) use a simple 3-parameter geocentric translation from WGS84. JGD2011 was updated after the 2011 Tohoku earthquake.

📋 Operation Steps
  1. Enter your JGD2000 coordinates in the input field (latitude, longitude, one pair per line)
  2. Click the Convert button to transform coordinates from JGD2000 to WGS84
  3. Review the converted WGS84 coordinates in the output field
  4. Copy the results or save them as an XLSX file for further use
💡 Tips
  • Ensure coordinates are within valid ranges before conversion
  • For batch conversions, enter one coordinate pair per line
  • Verify a sample of converted coordinates on your target platform
  • All conversions are performed client-side for complete data privacy

Frequently Asked Questions

The accuracy depends on the specific coordinate systems being converted. For standard geographic transformations between JGD2000 and WGS84, typical accuracy is within sub-meter range under normal conditions. For systems requiring 7-parameter transformations, accuracy depends heavily on the quality and regional relevance of the parameters used. Always verify results for critical applications.

Yes! Our tool supports batch conversion. Simply enter multiple coordinate pairs, one per line, in the input field on this page. All coordinates will be processed simultaneously, and you can download the results as an XLSX file for further analysis or integration.

Enter coordinates in the format: latitude, longitude (one pair per line). Latitude should be the first value, longitude the second. For example: 23.05105,113.37149. Ensure latitude is between -90 and 90, and longitude is between -180 and 180.

For this conversion, standard parameters may be sufficient for most applications.

Absolutely. All coordinate conversions are performed entirely in your browser using client-side JavaScript. Your data is never sent to any server, ensuring complete privacy and security of your geographic information. This is especially important for sensitive location data.

JGD2000 jgd2000 was japan's national geodetic system before the 2011 earthquake, based on itrf94 and the grs... WGS84 wgs84 (world geodetic system 1984) is the global standard geodetic reference system used by gps. it . The conversion between them accounts for differences in their ellipsoid parameters, datum origins, and any encryption offsets.