Source: EPSG:9518 — WGS 84 + EGM2008 height
compound horizontal + vertical reference system · Area of use: World
+proj=longlat +datum=WGS84 +geoidgrids=us_nga_egm08_25.tif +geoid_crs=WGS84 +vunits=m +no_defs +type=crsMore about EPSG:9518 →
Convert EPSG:9518 to EPSG:4979
Online coordinate converter from WGS 84 + EGM2008 height (EPSG:9518) to WGS 84 (EPSG:4979). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
The EPSG dataset defines official transformation parameters for the reverse direction. See WGS 84 to WGS 84 + EGM2008 height — the parameters are invertible.
Convert EPSG:9518 to EPSG:4979 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:9518", "EPSG:4979", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:4979 — WGS 84
geographic system using latitude, longitude and ellipsoidal height · Area of use: World
+proj=longlat +datum=WGS84 +no_defs +type=crsMore about EPSG:4979 →
Frequently asked questions
- How accurate is converting WGS 84 + EGM2008 height to WGS 84?
- Projection-only conversions are accurate to floating-point precision. If a datum shift is involved, browser-based tools use Helmert parameters which are accurate to roughly 1-5 m; for surveying-grade work apply the official grid-shift transformation 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.