I'm trying to figure out what a particular code represents in the US Census Tiger Line files for roads. I downloaded roads for the US from here. I've searched the documentation (link to large pdf) and the web; all that I can find is the following:
All Roads (county-based) Record Layout [top]
File Name: tl_2010_[state-county FIPS]_roads.shp
Field Length Type Description
STATEFP 2 String State FIPS code
COUNTYFP 3 String County FIPS code
LINEARID 22 String Linear feature identifier
FULLNAME 100 String Concatenation of expanded text for prefix qualifier, prefix direction, prefix type, base name, suffix type, suffix direction, and suffix qualifier (as available) with a space between each expanded text field
RTTYP 1 String Route type code
MTFCC 5 String MAF/TIGER feature class code
I assume that RTTYP 1 String Route type code
means it is some sort of classifier related to Primary Road
or Secondary Road
but I can't find that written down anywhere. If I examine a shapefile with this data I see the following:
I understand that MTFCC
is a classifier from here :
24 S1100 Primary Road
25 R1011 Railroad Feature (Main, Spur, or Yard)
26 R1051 Carline, Streetcar Track, Monorail, Other Mass Transit Rail)
27 R1052 Cog Rail Line, Incline Rail Line, Tram
28 S1100 Primary Road
29 S1200 Secondary Road
so I can figure out what each road segment represents, but I'm curious to know what the RTTYP
codes mean. I would love to find information about the surface material (whether it is asphalt or concrete, but I assume that information is not included).
Best Answer
I found this metadata file indicating: