Datasets
There are six layers in DCW China Set: roads, railroads, drainage system, contours, populated places, and urbanized areas. The following provides a brief description of the contents of each of these layers, together with the coverage names. The coverage names in parentheses are coresponding layers in the DCW_PLUS sub-set. Information regarding file size and format follows.
Layer 1.
Coverage Name: PPLACE_CHN, (PPLACE_PLU)
Feature: Populated Place
Feature class type: Point
This layer has two attribute items:
TYPE
Code Definition
1 Populated place
2 Populated place associated with city polygons
3 Villages, strategic or landmark places
NAME -- Name of the place in Pinyin
Layer 2.
Coverage Name: UAREA_CHN, (UAREA_PLU)
Feature: Urbanized Area
Feature class type: Polygon
This layer has one attribute item:
PPTYPE
Code Description
1 Built-up area
9 Non-urbanized area within urbanized area
Note: UAPLUS_VPF does not have PPTYPE.
Layer 3.
Coverage Name: ROAD_CHN, (ROAD_PLU)
Feature: Roads
Feature class type: Line
This layer has one attribute item:
TYPE
Code Description
1 Dual lane highways (divided)
2 Primary or secondary roads or highways
3 Tracks, trail or footpaths
8 Connector
Layer 4:
Coverage Name: RAILROAD_CHN, (RAILROAD_PLU)
Feature: Railroads
Feature class type: Line
This layer has one attribute item:
TYPE
Code Description
1 Single track railroads
2 Multiple tract railroads
3 Light railroads
8 Connectors
Layer 5:
Coverage Name: DNLINE_CHN, (DNLINE_PLU)
Feature: Drainage System
Feature class type: Line
This layer has one attribute item:
TYPE
Code Description
1 Streams, rivers, channelized rivers
2 Inland shorelines
3 Wet sand limits
4 Canals, aqueducts, flumes, penstocks, kanats
5 Glacial limits
6 Snowfield, glacier, landice to waterice or ocean
7 Ice free limits
8 Connectors
Layer 6:
Coverage Name: CONTOUR_CHN, (CONTOUR_PLU)
Feature: Contours
Feature class type: Line
This layer has one attribute item:
VAL -- elevation value of the contour line, expressed as feet above mean sea level.
Note: There are some areas where no data were available.
They appear blank on the map.
Contours are broken at the edges of these areas.
All coverages/layers are currently available in Arc/Info export format. Aproximate file sizes are as follows:
Layer Coverage Export File Compressed
DNLINE_CHN 6.6 39.4 10.0
ROAD_CHN 2.3 13.8 3.7
RAILROAD_CHN 0.4 2.2 0.6
PPLACE_CHN 0.7 2.5 0.6
UAREA_CHN 0.3 1.3 0.4
CONTOUR_CHN 16.1 104.6 29.1
DNLINE_PLU 18.2 109.3 29.6
ROAD_PLU 7.6 44.3 11.7
RAILROAD_PLU 1.1 6.0 1.6
PPLACE_PLU 1.9 7.0 1.6
UAREA_PLU 0.7 3.5 1.0
CONTOUR_PLU 38.6 255.6 67.3