Wadiso 6 Tutorial > Wadiso 6 Tutorial: step-by-step > Additional modelling exercise > Importing a bitmap aerial photograph as further background

In this part of the exercise, a bitmap image will be imported into the drawing as additional background information.

The bitmap image will be imported into the drawing, on a new layer called PHOTO. First, this layer has to be created via CAD > Tools > Layer Manager. The Layer Control window will appear. Click New Layer, and enter the new layer's name: PHOTO. Select OK. To prevent that the raster background is drawn over the other plans, it should be moved to the beginning of the drawing order, ensuring that is drawn before other layers. Check that the Drawing Order is set to (bottom to top), and then drag (left-click and move the mouse, while keeping the button depressed) the PHOTO layer to just above the 0 layer. Now click on Make Current, which will make PHOTO the current layer. New objects always get created on the current layer. Select OK to close the layer manager.

The next step is to import the bitmap image (a 1:10000 scale orthophoto of the model area) via CAD > Insert > Bitmap, and click the Browse button to browse to Documents\GLS\Wadiso\Wadiso 6 - Tutorial 2 Image.jpg (Please note, on certain PCs, the file browser box will only appear if you hold down the Shift key, while clicking on the Browse button. We are working on the problem; please bear with us). Select OK. The settings in the Insert bitmap window will automatically be set from the accompanying world file. If the image has no world file, then the user will have to set these settings manually. If there is no information available on the real world co-ordinate of the top left position of the image, then simply accept the default 0 values for this setting, and only specify further the DPI and Scale settings. The image will then appear correctly according to scale, but will usually be in the wrong co-ordinate system, that does not match with the other data layers in the project. It is, however, easy to fix the image to real world co-ordinates (or some other project specific co-ordinate system) by simply specifying the co-ordinates for two known points on the image. This can be accomplished by following the exact same procedure as for fixing background drawings.

Finally, the drawing can be saved (via CAD > Save Drawing As...) in the directory Documents\GLS\Wadiso, under another name (say “Wadiso 6 - Tutorial 2 drawing_with image.abd”). The file Save as type should be set to Albion Drawing (*.abd).