USGS DLG files

[KLENKUS1 at VAXC.STEVENS-TECH.EDU]

Ive loaded down the files from the USGS for new jersey
from edcftp.cr.usgs.gov.  They load up fine to grass
but Im a little confused as to the coordinate 
system. The readme file states that it is a ground
planimetric corrdiate system measured in feet.

Is this  UTM, state planer,  or what?

For an area in the newark-e_NJ map I get x,y's with
542662.61 4537522.04.

any help would be appreciated

kym lenkus
davidson laboratory