I'm having some trouble going from lat/lng to block data.
The example here (http://www.census.gov/developers/data/geography_list_sf1.html) seem to indicate that state, country, and tract information is required to get the block data.
Here (http://www.census.gov/developers/geo/) it recommends using the FCC's Block Conversion API to convert lat/lng to block FIPS code.
That's great, but it doesn't return the tract so I'm not able to access the census data. Am I missing something? How are others doing this?