KPHL Spot 1, Spot 2, etc..

I am listening to phl and hear spot 1 etc…I do not see it on the phl map. What where ??? any know so that I can understand this??? Thanks!

These are ramp control spots.
If you look at the airport diagram there is an * indicating this.
They are not depicted on the general Airport diagram.
They are depicted on company provided charts & physically painted on the airport surface.
They are the spots where ramp control (non atc) hands the aircraft over to ground (atc).

Thanks for taking the time to clarify this for me. I thought it was referring to the deicing area near 27R. Thanks again!!!