I'm curious to hear how others choose an appropriate coordinate system when creating a new feature class that has a large spatial extent and spans several zones. Two scenarios come to mind:
1. When digitizing polygons that fall in various regions across North America. Is the correct choice to always choose a geographic coordinate system (such as WGS84) for this scenario?
2. On a smaller scale, A Feature Class that will span a 10 mile region but spans two different state plane zones or UTM zones. Is there a best approach for choosing which zone to use?
Any insight would be much appreciated.