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System Engineering Branch

U.S. TWEB Routes

i
Description Valid Date Available Version(s) Size (bytes) #Records Documentation
TWEB Routes 28 November 2006 Download Compressed Shapefile tw28nv06.zip 85,707220 Change History Metadata
TWEB Anchor Points 28 November 2006 Download Compressed Shapefile ta28nv06.zip 13,295 546 Metadata


File Specifications:

Naming Convention: w_ ddmmyy .shp/.shx/.dbf - where .shp, .shx, .dbf are the extensions of the 3 component files of the shapefile and .prj is the projection file.
Shapefile Type: Lines (routes), Points (anchors)
Source: NWSI 10-805
Last Modified: 28 November 2006

Attributes:

TWEB Route Shapefile:
field name type width,dec description
Route character 4 Route Number
Anchor_ids character 24 Four character route anchors separated by ";"


TWEB Anchor Point Shapefile:
field name type width,dec description
Route character 3 Route Number
Anchposnnumeric1Sequence number for anchors in a route
Anchor character 4 Four character anchor identifier
Lonnumeric 10,5 Longitude of the anchor point
Latnumeric 9,5 Latitude of the anchor point
Commentcharacter 12 Type of anchor point (e.g., airport)




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