I tend to think of geometry in terms of dimensionless units. Inasmuch as SketchUp uses inches internally, that’s my unit of choice. Once imported into SketchUp, it can be scaled as needed. This is admittedly a lame excuse for my lazy programming
Not that I’ve discovered … it’s similar to the STL format in that regard (see attached PDF).
You’re right, of course. My lazy hack for this is to provide a scale factor option. I messed around a bit with adding a geolocation option if the coordinates were in GPS units, but not much else has changed since I first wrote this.
I’m not terribly good at user interfaces … 99% of my production code runs at a much lower level and doesn’t interact with the user at all.
Here’s the Shapefile document I’ve used as a reference … it’s from 1998 so I’m not sure how current it might be. shapefile.pdf (123.8 KB)