Coordinate system Tiepoints editor

Add tiepoint

 

Adds a tiepoint to this coordinate system tiepoints. A tiepoint establishes the relation between a current XY-coordinate and a future correct XY-coordinate.

Dialog box:

X Y:

The current XY-coordinate of the position that you clicked in the background map is shown.

Related X Y:

To obtain a correct XY-coordinate for this tiepoint, either:

  • read the correct XY-coordinate for this position from a paper map, and type these in the Rel X Y boxes, or
  • click at the same position in a map window which already has correct coordinates (master/slave) and the related X Y boxes are automatically filled out, or
  • digitize the same position on a map stuck on the digitizer and the related X Y boxes are automatically filled out.

When you already have a (mathematically) sufficient number of tiepoints, and you add a new tiepoint, the dialog box comes up with a suggestion for the correct XY-coordinates for this point. The suggested correct XY-coordinate gives an indication of the quality of your existing tiepoints. You should never accept this suggestion but always look up the correct XY-coordinate from a paper map, a master, etc.

When you click OK, the tiepoint will be added to the tiepoint table.

Tips:

See also: