Combine overhead pics to create a track plan?

[NtheBasement]

I want to create an accurate track plan of my layout.   I was thinking I could take multiple shots from the ceiling straight down and then somehow combine them into a single image of the whole layout.  Has anyone tried to do that and if so, how?  All I can think of is (painful!) crop each one so the edges match up and then tile them together.

[Scottl]

I've seen it done.  Make sure the photos are nadir- properly oriented vertically.  What you want to create is an orthophoto, there is open source software to do it.  Very common thing to do with with drone images

[NtheBasement]

Thanks for the tip!  Knowing what keyword to search for is half the battle.

[NtheBasement]

The secret search keyword was "orthophoto".  Got decent results from a program called SkyeBrowse, which creates 3-D models from drone videos.  Worked fine with video from my phone.  The 3-D model is interesting to move around in.  The 2Ds, attached, have watermarks which presumably would go away if I spent $.  I can create a drawing from these no problem. [ Guests cannot view attachments ] [ Guests cannot view attachments ]

[Scottl]

Awesome.