C.6. Trimming and scaling the base drawing<br>

C.6. Trimming and scaling the base drawing

In the last stage of combining the scanned drawing, you can trim it (cut off unwanted margins) and scale it so that it can be loaded onto the graphical editor. There are two ways of scaling the map (base drawing):

1. Based on the known scale of the base drawing and selected DPI scanning resolution (DPI – dots per inch) – usually the following resolutions are available: 100, 150, 200, 300 and 600 DPI.

2. Based on the specified actual distance between two marked points.

¨ To trim the drawing:

1. Select the “Trim” tab in the right part of the screen.

2. Mark with the RIGHT mouse button two points (upper left and lower right) of the final form of the base drawing.

3. Click “Trim”.

¨ To scale the base drawing based on known scale and DPI:

1. Switch to the “Scale” tab in the right part of the screen.

2. Check the “Base scale and DPI” box.

3. Specify the scale and DPI.

4. Click “Scale” – the “m / pixel” conversion factor is then displayed.

¨ To scale the drawing based on the actual distance between two marked points:

1. Switch to the “Scale” tab in the right part of the screen.

2. Check the “Distance between marked points” box.

3. Mark two points on the base drawing (map) with the RIGHT mouse button.

4. Enter the actual distance between the points in metres.

5. Click “Scale” – the “m / pixel” conversion factor is then displayed.

After combining all fragments of the base drawing and saving it to the disk, click on the “End” button to exit the “Scan Combine” application.