China Roads, 1990 is a line theme representing the roads in China, circa the late 1980s. This dataset is based on DCW data (late 1980s), uncorrected. Note: China has greatly expanded roads since 1990. Version 4: reprojected to Gauss Kruger Xian 1980 Zone 19.
Purpose
Digital Chart of the World (ESRI / DMA datasets), processed for use with CHGIS data layers.
Temporal Extent
Currentness Reference
publication date
Time Instant
1990
Bounding Box
West
69.102738
East
136.509839
North
54.182111
South
17.501318
Theme Keyword
roads
Theme Keyword Thesaurus
GNS feature types
Theme Keyword
transportation
Theme Keyword Thesaurus
ISO 19115 Topic Categories
Theme Keyword
Streets
Roadways
Highways
Theme Keyword Thesaurus
None
Place Keyword
China
Place Keyword Thesaurus
Library of Congress Subject Headings
Temporal Keyword
1990
Temporal Keyword Thesaurus
None
Access Restrictions
For current Columbia affiliates only.
Use Restrictions
For educational, non-commercial use only.
Status
revised (Jan 2007)
Maintenance and Update Frequency
None planned
Point of Contact
Contact Organization
CHGIS, Harvard Yenching Institute
Contact Telephone
617-496-6222
Contact Electronic Mail Address
mberman@fas.harvard.edu
Credit
"Digital Chart of the World Files, China." (c) ESRI and Defense Mapping Agency, 1990
Native Data Set Environment
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.0.1324
Cross-Reference
Originator
China Historical Geographic Information System
Publication Date
Jan 2007
Title
DCW China 1990 Roads
Geospatial Data Presentation Form
vector digital data
Series Information
Series Name
China Historical Geographic Information System
Issue Identification
Version 4
Other Citation Details
(c) Harvard Yenching Institute
Cambridge, MA (USA)
Data Quality Information
Attribute Accuracy Report
China has greatly expanded roads since 1990.
Lineage
Spatial Data Organization Information
Direct Spatial Reference Method
Vector
Point and Vector Object Information
SDTS Terms Description
SDTS Point and Vector Object Type
String
Point and Vector Object Count
27256
Spatial Reference Information
Horizontal Coordinate System Definition
Planar
Map Projection
Map Projection Name
Transverse Mercator
Transverse Mercator
Scale Factor at Central Meridian
1.000000
Longitude of Central Meridian
111.000000
Latitude of Projection Origin
0.000000
False Easting
19500000.000000
False Northing
0.000000
Planar Coordinate Information
Planar Coordinate Encoding Method
coordinate pair
Coordinate Representation
Abscissa Resolution
0.000000
Ordinate Resolution
0.000000
Planar Distance Units
meters
Geodetic Model
Horizontal Datum Name
D_Xian_1980
Ellipsoid Name
Xian_1980
Semi-major Axis
6378140.000000
Denominator of Flattening Ratio
298.257000
Entity and Attribute Information
Entity Type
Entity Type Label
v4_dcw_rds_lin
Entity Type Definition
Roads
Attributes
FID
Internal feature number. (Sequential unique whole numbers that are automatically generated.)
Definition Source
ESRI
Shape
Feature geometry. (Coordinates defining the features.)
Definition Source
ESRI
FNODE_
Endpoint identifier
TNODE_
Endpoint identifier
LPOLY_
RPOLY_
LENGTH
Length of the segment
ROADS_
Segment identifier
ROADS_ID
RDLNTYPE
Road line type
1
Dual lane (divided) highway
2
Primary and secondary road
3
Track, trail, or footpath
8
Added road connector within urbanized area polygons
RDLNSTAT
Road line status
1
Functioning
2
Under construction
3
Existence doubtful or "reported" to exist
4
Compile road connector (used for arcs added from other source materials in order to provide cartographically correct connectivity within urbanized area polygons)
5
Compiled from adjacent, more recent sheet (used for arcs added for edgematch or network connectivity in the ONC sheet overlap areas)
6
Compiled, under construction (used for arcs added for edgematch or network connectivity in the ONC sheet overlap areas)
9
Schematic road (used for arcs added within the urbanized area polygons for network connectivity only)
Distribution Information
Distributor
CHGIS - Harvard Yenching Institute Center for Geographic Analysis
Name
Name
Metadata Reference Information
Metadata Date
20070713
Metadata Contact
Contact Information
Contact Organization Primary
Contact Organization
Research Data Services (RDS), Columbia University Libraries
Contact Person
GIS/Metadata Librarian
Contact Address
Address
420 W. 118th St., 215 IAB, MC 3301
City
New York
State or Province
MA
Postal Code
10027
Country
USA
Contact Voice Telephone
(212)854-6012
Contact Electronic Mail Address
data@library.columbia.edu
Metadata Standard Name
FGDC Content Standards for Digital Geospatial Metadata
