I have 1 single shapefile of about 70k square polygons in a grid. I want to run a process/tool/script to split all 70k polygons into 4 equal parts. The polygons are contiguous, so each polygon only has 4 vertices. Basically I have a shapefile of sections for a sate, and I want to split it into 1/4 sections so each original square section is broken into 4 equal 1/4 parts.
How can I split all 70,000 contiguous square polygons at once with only 4 vertices each into 4 equal parts to create 4 polygons within each original polygon?