The MCDs file contains all MCDs and CCDs (county subdivisions record type 060) 
places in the U.S. as of the 1990 Census and is plain ASCII text, one line per 
record. The fields are laid out as follows: 

Columns 1-2: State FIPS Code 
Columns 4-8: County Subdivision FIPS Code ce) 
Columns 10-75: Name. Includes name of place/county and type of place (either 
city, town, borough, village, or CDP). 
Columns 77-78: State Abbreviation 
Columns 80-88: Total Population (1990) 
Columns 90-98: Number of Housing Units (1990) 
Columns 100-109: Land area included (in thousandths of a square kilometer) 
Columns 111-120: Water area included (in thousandths of a square kilometer) 
Columns 122-130: Latitude (millionths of a degree: 10^6 units=1 deg). First 
character is (+) or (-), denoting N or S latitude, respectively. 
Columns 132-141: Longitude (millionths of a degree). First character is (+) or 
(-), denoting E or W longitude, respectively. 
Columns 143-145: County FIPS Code