ReadyLoad a CSV and the page will detect RD X, RD Y and bearing automatically.
RD X—
RD Y—
Bearing—
Change detected columns
About the conversion
Preferred method: RDNAPTRANS™2018 variant 2 (EPSG operation 9282) using the RD transformation grid. The page first looks for a same-site rdtrans2018.gsb, then loads the NSGI grid from the archived OSGeo datum-grid repository. Grid: NSGI, CC BY 4.0. No CSV content is transmitted.
If that static grid cannot be reached, the page automatically uses the EPSG 9281 coordinate-frame fallback (stated accuracy 0.25 m). The active method is always shown before download.
Bearing conversion is (360 - source) mod 360: 0→0, 90→270, 180→180, 270→90.
Output preview
appended values
First 200 rows
No file loaded
Your converted CSV will appear here.
Original values stay untouched; calculated fields are appended.
Original values stay untouched; calculated fields are appended.