To group 480 points into sets of 12 closest neighbors in ArcMap 10.8, you can follow this general approach. This solution makes use of some spatial analysis tools available in ArcMap. Here's how to do it:
### Step 1: Prepare Your Data
1. **Load Your Shapefile**: Open ArcMap and add your shapefile of the 480 points to your map.
2. **Check the Coordinate System**: Make sure the points are in a suitable coordinate system for distance calculations