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ATS77 / Nova Scotia MTM

Enter the original easting and northing in metres.

Read as: ATS77 / Nova Scotia MTM 5
  • Decimal degreesWGS 84 44.648800, -63.575200
  • Degrees, minutes, secondsWGS 84 44°38′55.68″N 63°34′30.72″W
  • Degrees, decimal minutesWGS 84 44°38.9280′N 63°34.5120′W
  • UTMWGS 84 20T 454389 4944099
  • MGRS / USNGWGS 84 20T MQ 54389 44098
  • ATS77 / Nova Scotia MTMEPSG:2295 · ≈0.06 m 5573351.29 4945832.50
  • NAD83 / UTMEPSG:26920 454389.34 4944098.63
  • Plus CodeOpen Location Code 87PRJCXF+GW
  • Geohash dxfy121fn
  • Maidenheadham radio FN84fp

Tap the map to convert that point.

The older Nova Scotia grid

ATS77 / MTM zone 4 is EPSG:2294 and zone 5 is EPSG:2295. The false eastings are 4,500,000 m and 5,500,000 m. At Ketch Harbour monument NSCM 210111, the published ATS77 zone 5 coordinates are E = 5575117.356 m and N = 4928405.872 m.

These differ from MTM NS 2010 in both prefix and datum. Adding 20 million metres to the easting alone is not a transformation to NAD83(CSRS)v6.

Official grid and observed limits

The converter loads the Nova Scotia NS778302 grid for ATS77 to NAD83(CSRS)v6. Its catalogued accuracy is 0.06 m. In the published monument pairs used by the tests, 11 of 30 differ by more than that figure, with a maximum of 0.22 m. Those cases remain documented as pending checks; the page does not promise six-centimetre agreement everywhere.

If the grid cannot load, there is no official Helmert fallback in the catalogue: only an ellipsoid change is available, with a conservative 5 m indication. The result reports the method actually used.

Projection versus datum accuracy

The ATS77 MTM projections reproduce NSCRS reports within 3 mm. That tests the projection only; grid uncertainty and the approximation to WGS84 remain separate. Source: Nova Scotia Coordinate Referencing System.

Frequently asked questions

Can this transform ATS77 data from New Brunswick?

This page uses Nova Scotia MTM definitions and the Nova Scotia grid. It does not provide the separate provincial transformations for New Brunswick or Prince Edward Island.

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