I inherited some shapefiles that I've been trying to clean up in QGIS and Grass. The shapefile is a large area covering a watershed, the person who digitized it, did so in small chunks without using the snapping tool, so there were many overlaps and gaps. I cleaned those up with the dissolve tool, and everything seems fine.
This is when we run into the problem. When I validate the shapefile, it comes out as invalid with 4 different errors. They are all "polygon inside polygon" but they show up at the coordinates 0,0 and there's nothing actually there.
Has anyone ever had this error?
Here's a link to a Google Drive folder with the files I've included the shapefile in question, and the two files created from the validation tool. I also included a PSR file showing my steps.
Basically, I'm trying to find the location of the error, according to the Error layer, and when I zoom into the selection it brings me to the coordinates 0,0, and there's no error there.