Coordinate converter VN-2000 ⇄ Maps WGS84
Convert land-plot vertices from the land title into real longitude & latitude. Automatically detects the central meridian across the 63 old provinces, swaps X/Y order, closes the boundary polygon and measures the area for comparison.
Plot boundary visualisation
Enter or paste the coordinate vertices in the left column, then click “Convert”.The plot boundary map, central meridian data and area will appear here instantly.
Geodesy knowledge & the VN-2000 coordinate standard
VN-2000 is Vietnam’s national coordinate system (Transverse Mercator projection, adjusted WGS84 ellipsoid), expressed in metres (X: northing, Y: easting). While WGS84 is the global GPS coordinate system used by Maps WGS84, expressed in decimal degrees. Conversion between the two uses the national 7-parameter Helmert set issued under Decision 05/2007/QĐ-BTNMT.
Each province/city in Vietnam has its own central meridian (KTT), set by Circular 973/2001/TT-TCĐC. Being off by a single KTT step (15 arc-minutes) shifts the position on the ground by tens of kilometres. DatNgop’s tool detects the KTT automatically by checking that the position falls inside a real ward/commune boundary.
On page 3 or 4 of the land-use right certificate, the coordinate table lists vertices 1, 2, 3... Many titles print column X (millions, from ~950,000 m to ~2,550,000 m) and column Y (hundreds of thousands, ~300,000 m to ~800,000 m). The system detects this automatically and swaps the axes if you paste them the wrong way round.