Street Name Types in Shapefile do not have a one-to-one correspondence with the GDF 7A
attribute values for street name type. In the NAMETYP field in the nw and gc layers, the name
types are presented as a bitmask collection with the following values:
- 0 = No Name
- 1 = Official Name
- 2 = Alternate Name
- 4 = Route Name
- 8 = Brunnel Name
- 16 = Street Name
- 32 = Locality Name
- 64 = Postal Street Name
A “bitmask” allows adding of more than one name type to properly define a name.
Example: "17" indicates that a street name (16) is the official name (1).
Example: "66" indicates that a postal street name (64) is the alternate name (2). In
addition, the Shapefile rn layer also contains complete route number and name
information. The information is stored as the actual text (not a numeric code) of a route name
or route number. The rn file also contains the Additional Extended Route name that is
found via the GDF 7A attribute, but is not in the nw or gc Shapefile
layers.
In GDF, all street name types are identified by the following
7A attribute values
(also a bitmask):
- 1 = Street Name
- 2 = Locality Name
- 4 = Additional Route Name
- 8 = Additional Extended Route Name
- 16 = Postal Street Name
Note: "Street Name" in GDF applies to both Street Names and Route Names or
Numbers.