How to use

the Georeference Tiepoints editor

This topic gives information on different methods to 'manually' insert tiepoints in the Tiepoint editor for a georef tiepoints, a georef direct linear or a georef orthophoto. For more information on georeference types, see ILWIS objects : georeferences.

When you already have tiepoints (X-coordinates, Y-coordinates, row numbers, column numbers) in a file, it is advised to use copy and paste, to paste these tiepoints into the tiepoint table of a georeference tiepoints. For a detailed description of the steps involved, see How to paste coordinates into a georeference tiepoints.

To insert tiepoints by using an existing map with coordinates (Master/Slave):

Then:

and

Repeat for other tiepoints.

To insert tiepoints by using a map on a digitizer:

Stick an analog paper map on the digitizer, setup the digitizer and reference the map. For more information, see How to setup a digitizer and reference a map.

Start the Georeference Tiepoints editor with the image that you want to give coordinates. Make sure that you can identify future tiepoints both in the image and in the map on the digitizer.

Then:

and

Repeat for other tiepoints.

To insert tiepoints by reading coordinates from paper:

Start the tiepoint editor with the map that you want to give coordinates.

Then:

Repeat for other tiepoints.

To insert tiepoints entirely by keyboard:

When you have a complete relation between row and column numbers and X and Y coordinates on paper, you can also:

then:

Repeat for other tiepoints.

See also: