Copying input data to clipboard:
Open the file which contains the coordinates and the row/column numbers for the tiepoints of your image(s).
ILWIS will expect to receive the following and preferably in this order:
X-coordinates |
Y-coordinates |
Row numbers |
Column numbers |
Make sure the 'columns' in your file are in this order and copy the block of XY-coordinates and corresponding Row/Column numbers to clipboard.
Below, an example is shown, of how the clipboard contents may look like after copying.
801490.000 |
8089155.000 |
23 |
90 |
802004.000 |
8075147.000 |
471 |
206 |
800242.000 |
8074191.000 |
510 |
156 |
802445.000 |
8077922.000 |
379 |
201 |
802841.000 |
8076212.000 |
433 |
224 |
797727.000 |
8076145.000 |
461 |
61 |
805768.000 |
8086385.000 |
90 |
247 |
Pasting into an ILWIS georeference tiepoints:
Create a georeference tiepoints, select or create a coordinate system into which the coordinates will fit, and choose a background map on which you wish to view the tiepoints. For more information, see Create a georeference.
The georeference tiepoint editor will be opened automatically.
The background map is shown, and at the bottom (default) of the window, you will see the empty tiepoint table:
Tip: If necessary, you can first re-order the columns in the tiepoint table so that the columns in the tiepoint table will comply with the order of the copied data. To change the position of a column in the table, drag a column header to a new position. The mouse pointer will change into a column icon while dragging.
If you have an empty tiepoint table as above, click once in the gray area at the left side of the tiepoint table (where the cursor is located in the picture above).
Now you can paste the clipboard contents into the tiepoint table:
Note:
If you already have some tiepoints, you can also add tiepoints by pasting.
The clipboard contents will be pasted into the tiepoint table.
If everything went OK, your tiepoint table may look as follows:
As you can see, the Active column (which indicates the tiepoints that are active) does not yet contain values, but the values for DRow and DCol (deviations for the current transformation) are immediately calculated.
You can activate tiepoints by typing a T for the each tiepoints in the Active column.
Tip: To get rid of the highlight in the tiepoint table (dark blue in the picture above), click once in a field in the tiepoint table which already contains a value, then press the Esc key on the keyboard.
See also: