Convert coordinates from ETRF2000-PL (EPSG:9701) to ETRF2000-PL + EVRF2007-PL height (EPSG:9657) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 2 transformations between ETRF2000-PL (EPSG:9701) and ETRF2000-PL + EVRF2007-PL height (EPSG:9657). Each applies to a specific area — pick the one whose area of use covers your data.
Grid file: Model_quasi-geoidy-PL-geoid2021-PL-EVRF2007-NH.txt
Reversible alternative to ETRF2000-PL to EVRF2007-PL height (2) (code 10347). Replaces 2011 model (CT code 9720) from 2022-04-04.
Grid file: gugik-geoid2011-PL-EVRF2007-NH.txt
Reversible alternative to ETRF2000-PL to EVRF2007-PL height (1) (code 9719).
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:9701", "EPSG:9657", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)geographic system using latitude, longitude and ellipsoidal height · Area of use: Poland
+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crsMore about EPSG:9701 →
compound horizontal + vertical reference system · Area of use: Poland - onshore
+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +geoidgrids=pl_gugik_geoid2021-PL-EVRF2007-NH.tif +geoid_crs=WGS84 +vunits=m +no_defs +type=crsMore about EPSG:9657 →