zipcode boundaries from Tiger

[Oliver Weatherbee]

I am having trouble extracting zipcode boundaries from the tiger census
line files.  I extract the files matching the cfcc code F50 which is supposed
to correspond to the zip code boundaries but I get a total of 0 lines read
out.  I don't think its a scripting/software problem because it works for
other cfcc codes (F10, F73, etc.).

My script (I am using GRASS) only looks at the files tgrXXXXX.f41 and tgrXXXXX.f42,
could this be the problem?

I would appreciate any help.

Thanks,

	Oliver Weatherbee
	oliver at earthview.cms.udel.edu