Using 2D.dwg of plans files to create reference images, or to create a 3d model

I want to use existing 2d plan files as reference images, of a boat, to create a 3d model of a portion of the boat, the bow and bowsprit.

Aaron has a nice video on using reference images SketchUp Skill Builder: Reference Images - YouTube. Using a PC.

In my case I have a nicely detailed Plan view with top, side and frontal views, converted to .dwg and the model resized in inches. ,dwg attached.

Aaron uses .jpg images and crops the reference images by exploding them and using the move tool, at about 5.54.

My problem is trying to get a .jpg or .pdf (working in Mac) with as good of detail as I can get with my .dwg.

Question is: So how could I “crop” an area out of the 2D .dwg to create the reference images in 3D. Or do I need another approach to importing and cropping reference images in a 2d.dwg to create references or the desired 3d model?

If you are imported .dwg files into SketchUp they come as geometry in a component container. Open the component for editing and select the stuff you don’t need, press the Delete key.

Thought I’d go blind with all the mouse clicks, if I did that, but the new Lasso is a wonder for this task. Thanks for the idea.

Learned I could not directly use the lines on the imported reference document, way too many voids so I created a new component above there reference document, finally got it clean, but when I tried to push/pull to create a 3/16" thick stainless panel, the initial face moved creating the sides 3/16 deep and the new face being 3/16" deep from the point of origin?

410 Import dims cropped v1.5.skp (1.4 MB)

Think I’ll build my models out of wood

Sorry. You’ve got quite a mess there. In general what I see and what I get from your description indicates to me that you need to do something differently. I’m guessing you’re ending up with something like this. I’ve created a simplified model because there’s so much clutter in your file.

It looks like there might some piercings in the object. If you would delete the faces skinning those openings first, then you would end up with the moving face.

Generally the workflow for something like your model shows is to create only the outline and any through holes and then extrude to thickness before adding any blind features. What I often see from newer users is they try to create all of the features in 2D and then go 3D and that’s really not the easiest way to do this stuff.