Source: EPSG:4687 — RGPF
geographic system using latitude and longitude on an ellipsoid · Area of use: French Polynesia
+proj=longlat +ellps=GRS80 +no_defs +type=crsMore about EPSG:4687 →
Convert EPSG:4687 to EPSG:4691
Online coordinate converter from RGPF (EPSG:4687) to Moorea 87 (EPSG:4691). 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 Moorea 87 to RGPF — the parameters are invertible.
Convert EPSG:4687 to EPSG:4691 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4687", "EPSG:4691", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:4691 — Moorea 87
geographic system using latitude and longitude on an ellipsoid · Area of use: French Polynesia - Society Islands - Moorea
+proj=longlat +ellps=intl +towgs84=218.769,150.75,176.75,3.5231,2.0037,1.288,10.9817 +no_defs +type=crsMore about EPSG:4691 →
Frequently asked questions
- How accurate is converting RGPF to Moorea 87?
- 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.