So you have a scanner and they want drawings- digitising: you’re doing it wrong!

On the left a drawing submitted from a laser scanning company on the right a photograph of the same detail. Spot the difference!

The benefit of the scan is entirely lost here: the requirement to submit a drawing should have directed the surveyor to consider an image-based approach but of course once you have bought the scanner it becomes a reflex reaction to use it! The means of capture has determined the data outcome…and not in a way the client expected!

It’s worth noting just how good the photograph is at capture : the crack and flake damage is recorded very clearly as well as the fine detail of the 18thC plaster moulding. Stereo cover would add the necessary metric performance, and the laser scan could then come into its own as control!

Obviously I can’t name names here but this is a very good example of a failure to understand information need, driven no doubt by an overconfidence in the performance of the scan data, sadly an all too common problem in heritage documentation.

Sadly this was another case of ‘Scan it! …and run’

About billboyheritagesurvey

Heritage worker
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One Response to So you have a scanner and they want drawings- digitising: you’re doing it wrong!

  1. Hello, thank you for sharing your information. Keep up your quality post.

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