✅ Yes - PDFs and aerial images can be used as an underlay
📄 PDF plans (digitise/trace)
You can use a PDF plan as a reference by importing it as an image underlay, then:
Scale the underlay using a known reference length (so you’re working at full size)
Digitise/trace the perimeter and key lines to build your roof/wall geometry
Optionally type exact line lengths as you go for precision
🛰️ Aerial images (top-down)
Scale + digitise the outline
Aerial images work the same way:
Import the image as an underlay (aerial image or scanned plan)
Scale it using an overall known dimension (often taken from the image provider’s measuring tools)
Digitise/trace the outline to generate full-size model geometry
📐 Oblique aerial images (angled views)
Measure pitch/slope from the photo
Roof Wizard can also import an oblique (angled) aerial image and use it to determine roof pitch/slope by aligning axes to the image.
⚠️ Accuracy tip
Your result is only as accurate as the source
It’s important to scale with a reliable known dimension and sanity-check your model - especially with aerial imagery (which can include distortion).