Hi,
I am also trying to extract the census blocks from
the by county TIGER data.  I have gotten good at the
roads and hydrography data, but am unclear on how to
get the block data.  The documentation says that the 
block numbers (for left and right sides of "chains"
are stored in the RT1 file, but there are no headers
to the files, so I can't tell where in the line the
information is stored.  

Sue Huse
REGIS
UC Berkeley


