@Jasper: Yes. I have the coordinates for all the points in green in my sample diagram. The narrow strips are roads. I need to get the corner coordinates for the 36 square'ish sections. In terms of linear algebra, I just know what it is but no real experience. I messed around with OpenGL graphics and programmed some simple 3d objects rotating but that's the extent of it. And that was 10 years ago. But I have a propensity for learning quick.