How do I calculate the bearing of a line?


The MapInfo Ruler tool does not give a bearing angle!
How do I calculate the bearing of a line, or between two points?


To calculate a bearing interactively with a ruler tool, use Discover's
QUERY>Map Object>Location Info

Or to calculate a selected lines bearing and saved in as a attribute use -
QUERY>Map Object>Line Orientation

MapInfo MapCAD, which is now turned on by default, adds a tool under -
SPATIAL>Calculate>Calculate Direction

This is incorrect. It calculates a mathematical standard cartesian angle, which is counter clockwise from the right hand direction (East).

To convert this into a GIS bearing, which is clockwise from North (top of map) you need to apply the following -

degResult = 90.0 - mathBasedDeg;
            if (degResult < 0)
                degResult += 360;
            if (degResult > 360)
                degResult -= 360;

Would you like to...

Print this page Print this page

Email this page Email this page

Post a comment Post a comment

Subscribe me

Remove Highlighting Remove Highlighting

Edit this article

User Opinions (0 votes)

No users have voted.

How would you rate this article?

Thank you for rating this article.

Related Articles

No related articles were found.


No attachments were found.

Last Updated on: 7th of October, 2019