Source: EPSG:4678 — Lao 1997
geographic system using latitude and longitude on an ellipsoid · Area of use: Laos
+proj=longlat +ellps=krass +towgs84=44.585,-131.212,-39.544,0,0,0,0 +no_defs +type=crsMore about EPSG:4678 →
Convert EPSG:4678 to EPSG:4676
Online coordinate converter from Lao 1997 (EPSG:4678) to Vientiane 1982 (EPSG:4676). 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 Vientiane 1982 to Lao 1997 — the parameters are invertible.
Convert EPSG:4678 to EPSG:4676 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4678", "EPSG:4676", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:4676 — Vientiane 1982
geographic system using latitude and longitude on an ellipsoid · Area of use: Laos
+proj=longlat +ellps=krass +no_defs +type=crsMore about EPSG:4676 →
Frequently asked questions
- How accurate is converting Lao 1997 to Vientiane 1982?
- 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.