Can I use Didger to digitize contour lines?

Yes, you can use Didger to digitize contour lines. If you have a paper map, you can either digitize them using a digitizing tablet or you can scan the map and import it into Didger and digitize onscreen.

The first step is to calibrate the tablet (Draw | Tablet | Tablet Calibration), or register the image upon import in the Image Registration and Warping dialog.

After the paper map or image is calibrated, click Draw | Polyline. When you digitize the contours, enter the contour value as the Primary ID for the polyline.

Didger also has the ability to automatically digitize lines from an image (Image | Vectorize Image), so you don't have to manually digitize the contours. 

Updated October 20, 2016

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