imported photo dimensions

[wadeherring]

I have imported an overhead photo. How do I set the dimensions for the property lines I'm sketching?

[ToanDN]

Scale the photo?

[wadeherring]

can I do that when I don't know the dimensions of the photo? all I have are the dimensions of the property. I can't just crop the photo because the property is irregular.

[ToanDN]

Yes you can scale the photo based on a known distance such as the length of a building or a property line in the photo. 

If you get photos from Google Earth of map you can include a scale bar embed in the photo so that you can scale the photo based on it.