C.3. Rules for scanning base drawing fragments<br>

C.3. Rules for scanning base drawing fragments

With “Scan Combine” you can scan fragments of the base drawing using TWAIN compatible scanners or load drawing fragments scanned previously with the use of other applications.

¨ To scan a base drawing fragment:

1. Click “Scan”.

2. Follow instructions displayed.

¨ To load a base drawing fragment scanned with the use of other application:

1. Click “Load”.

2. Select file to be loaded and click “Open”.

When scanning try to follow these guidelines:

1. Drawing fragments should be scanned as monochrome images (1 bit) or 256-colour images (8 bit). This is perfectly sufficient and the file size is kept within reasonable limits.

2. The drawings should be scanned with overlaps in each fragment, so that at least two common spots can be defined in every two adjacent fragments.

3. Try to scan fragments without turning the base drawing.

4. Usual scanning resolution is 150 or 300 DPI with multicolour drawings and 300 or 600 DPI with black and white drawings. Generated files have reasonable sizes. Of course, other DPI settings are allowed.

The scanned fragments of a base drawing may look like in the example below. Crosses indicate common characteristic points. Of course, you don’t have to draw any crosses on the base drawing before scanning it. For a characteristic point you can select, for instance, a corner of a building, crossing point of lines or ground elevation designation.