EPSG:CODE

ITRF90 to ITRF91 (2)

EPSG:4912 → EPSG:4913

Coordinate Reference Systems

Source CRS
EPSG:4912
ITRF90
Geocentric
Target CRS
EPSG:4913
ITRF91
Geocentric

Transform Coordinates

Remarks

Parameter values derived from differences in CTs to ITRF2020 (codes 10100 and 10103). These supersede all values published in past IERS/ITRF documentation (CT code 9022). Scale difference in ppb and scale difference rate in ppb/yr where 1/billion = 1E-9.

Frequently Asked Questions

How do I convert ITRF90 to ITRF91 coordinates?

Use the coordinate transformation tool above to convert ITRF90 (EPSG:4912) to ITRF91 (EPSG:4913). Enter your source coordinates and click Transform. This uses the Position Vector transformation (geocentric domain) method with 0.007m accuracy.

How do I transform ITRF90 to ITRF91 using Proj4js?

Use proj4.defs to define both EPSG:4912 and EPSG:4913, then call proj4(source, target, [x, y]) to convert coordinates programmatically.

What is the accuracy of the ITRF90 to ITRF91 transformation?

This transformation (EPSG:10141) has an accuracy of 0.007m using the Position Vector transformation (geocentric domain) method. Area of use: World.