Copyright © 2002, IIASA & RAS
All Rights Reserved
TRANSPORTATION - Database
Source
Adapted from:
The
Digital Chart of the World (DCW),
Environmental Systems Research Institute, Inc. (ESRI)
Technical Description
These coverages were created from the Digital Chart of the World datasets,
using the 1993 version at the 1:1,000,000 scale. For more explanation
on the source and creation of this data, please refer to the above link.
Coverage Definition
| Coverage | Data Type | Itmes | Item Description |
| Railway | Line |
ra_type |
Railway Classes |
| Roads | Line |
ro_type |
Road
Classes Status |
| Rivers | Line | river | Major River Names |
Attribute Description
Railway Classes
= Single track railroad
= Multiple track railroad
= Light-duty railroad, including carlines, tramways, and other similar
light-load-bearing railways
= Added railroad connector within urbanized area polygons
Status
= Functioning
= Nonoperating, abandoned, destroyed, or under construction
= Existence doubtful or "reported" to exist
= Compiled railroads (used for arcs added from other source materials
in order to provide cartographically correct connectivity within the urbanized
area polygons)
= Compiled from adjacent more recent map sheet (used for arcs added for
edgematch or connectivity in the ONC sheet overlap areas)
= Compiled, under construction (used for arcs added for edgematch or connectivity
in the ONC sheet overlap areas)
= Schematic rail line (used for arcs added within the urbanized area polygons
for network connectivity only)
Road Classes
= Dual lane (divided) highway
= Primary and secondary road
= Track, trail, or footpath
= Added road connector within urbanized area polygons
Status
= Functioning
= Under construction
= Existence doubtful or "reported" to exist
= Compile road connector (used for arcs added from other source materials
in order to provide cartographically correct connectivity within urbanized
area polygons)
= Compiled from adjacent, more recent sheet (used for arcs added for edgematch
or network connectivity in the ONC sheet overlap areas)
= Compiled, under construction (used for arcs added for edgematch or network
connectivity in the ONC sheet overlap areas)
= Schematic road (used for arcs added within the urbanized area polygons
for network connectivity only)
