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Convert ISN93 to ISN93 + ISH2004 height

Convert coordinates from ISN93 (EPSG:4945) to ISN93 + ISH2004 height (EPSG:9948) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4945-to-epsg-9948

Official EPSG transformation from ISN93 to ISN93 + ISH2004 height

The EPSG Geodetic Parameter Dataset defines 1 transformation between ISN93 (EPSG:4945) and ISN93 + ISH2004 height (EPSG:9948). Its parameters, accuracy and area of use are listed below.

ISN93 to ISN93 + ISH2004 height (1)

EPSG:9955±0.05 m
Method:
Geog3D to Geog2D+GravityRelatedHeight (Gravsoft)
Area of use:
Iceland - onshore
Scope:
Reversible geoid model transformation.

Grid file: Icegeoid_ISN93.gri

Reversible alternative to ISN93 to ISH2004 height (1) (code 9954). File is also available in NOAA VDatum format (Icegeoid_ISN93.gtx). Replaced by Icegeoid_ISN2004.

Convert EPSG:4945 to EPSG:9948 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4945", "EPSG:9948", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4945 — ISN93

geographic system using latitude, longitude and ellipsoidal height · Area of use: Iceland

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
More about EPSG:4945 →

Target: EPSG:9948 — ISN93 + ISH2004 height

compound horizontal + vertical reference system · Area of use: Iceland - onshore

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +vunits=m +no_defs +type=crs
More about EPSG:9948 →

Frequently asked questions

How accurate is converting ISN93 to ISN93 + ISH2004 height?
The most accurate official EPSG transformation between these systems is accurate to about ±0.05 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation (including the grid-shift files listed below) in a desktop GIS.
Does my data leave the browser when I use this converter?
No. All coordinate transformations are computed locally in your browser using proj4js. The coordinates you enter are never transmitted to any server.
Need the reverse? Convert EPSG:9948 to EPSG:4945 →