I just started using ArcGis Earth to plot a part of rural Oahu. Everything works just fine with the earth photo overly.. Then, when I add the parcel map shapefile to the map, the parcels load very slowly, appear with exceptionally wide lines, and finally, when I move the mouse to change scale, everything goes very slowly and then appears a s a screen-filling green blot.
I suspect the shapefile is too large--but neither processing power nor memory are a problem. As it is, though, I cannot combine the parcel file with my earth basemap and do any work.