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Help for INDIR

The INDIR Inverse-Direct computation tool performs either a geodetic direct or inverse computation. Direct uses a starting point's geographic coordinates, an azimuth and a distance to compute the geographic coordinates of the end point. Inverse uses geographic coordinates of two points to compute azimuth and distance.

Two coordinate systems are available: geographic and UTM/MTM/Stereo. All coordinate fields are required in the chosen coordinate system, except heights.

Batch Processing

Single Calculation


Enter a value for a Zenith or Δh



Latitude 2 Longitude 2 h 2 (metres)
Distance (metres) Forward azimuth Reverse azimuth Zenith
Marker to marker

Use of Canadian Geodetic Survey products and data is subject to the Open Government Licence - Canada

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