Skip to content
transform

Convert RGSPM06 to RGSPM06 + Danger 1950 height

Convert coordinates from RGSPM06 (EPSG:4466) to RGSPM06 + Danger 1950 height (EPSG:9541) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4466-to-epsg-9541

Official EPSG transformation from RGSPM06 to RGSPM06 + Danger 1950 height

The EPSG Geodetic Parameter Dataset defines 1 transformation between RGSPM06 (EPSG:4466) and RGSPM06 + Danger 1950 height (EPSG:9541). Its parameters, accuracy and area of use are listed below.

RGSPM06 to RGSPM06 + Danger 1950 height (2)

EPSG:9641±0.05 m
Method:
Geog3D to Geog2D+GravityRelatedHeight (IGN2009)
Area of use:
St Pierre and Miquelon - onshore
Scope:
Reversible geoid model transformation.

Grid file: RASPM2018.mnt

Reversible alternative to RGSPM06 to Danger 1950 height (2) (code 9228).

Convert EPSG:4466 to EPSG:9541 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4466", "EPSG:9541", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4466 — RGSPM06

geographic system using latitude, longitude and ellipsoidal height · Area of use: St Pierre and Miquelon

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
More about EPSG:4466 →

Target: EPSG:9541 — RGSPM06 + Danger 1950 height

compound horizontal + vertical reference system · Area of use: St Pierre and Miquelon - onshore

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +geoidgrids=fr_ign_RASPM2018.tif +geoid_crs=WGS84 +vunits=m +no_defs +type=crs
More about EPSG:9541 →

Frequently asked questions

How accurate is converting RGSPM06 to RGSPM06 + Danger 1950 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:9541 to EPSG:4466 →