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Africa road network, 1970s

Identification Information
Citation
Originator
Map and Geospatial Information Center, Lewis Library, Princeton University
Publication Date
20210820
Title
Africa road network, 1970s
Geospatial Data Presentation Form
vector digital data
Online Linkage
https://figgy.princeton.edu/downloads/425b06b0-2ad3-4c09-9476-69b5df7b1d85/file/c970f93e-5e7e-41d7-b507-09b198769a18
Abstract
Shapefile representing significant roads in Africa during the 1970s. Data were extracted from Michelin Africa maps published that decade and drawn at a scale of 1:4,000,000. For more detailed information on this dataset's production, please refer to the "supplemental information" portion of this record.
Purpose
For visualizing roads using GIS software.
Supplemental Information
To create this dataset, three 1:4,000,000 scale Michelin Africa maps published in the 1970s were first scanned at 400 DPI and georeferenced with the assistance of 2015 data from the GADM or Database of Global Administrative Areas. The specific maps used were: Africa Central and South/Madagascar (1974), Africa North and West (1976), and Africa North-East (1977). Road network centerlines were extracted from these georeferenced maps, assigned attribute values according to the map legends, and edge-matched to create a seamless dataset. Funding for this project was provided in part by the graduate student project fund, in conjunction with NSF project #10004995, and in part by Princeton University Library’s geographic data collection development fund. The project was completed in 2015, but the data were subject to a 5-year embargo.
Temporal Extent
Currentness Reference
Dates of situation.
Time Period
Beginning
19740101
End
19771231
Bounding Box
West
-17.484137
East
51.267301
North
37.371915
South
-34.799114
Theme Keyword
roads
railroads
infrastructure
transportation
public
open access
Theme Keyword Thesaurus
None
Theme Keyword
transportation
Theme Keyword Thesaurus
ISO 19115 Topic Categories
Place Keyword
Africa
Place Keyword Thesaurus
None
Temporal Keyword
1970
1974
1976
1977
Temporal Keyword Thesaurus
None
Access Restrictions
None
Use Restrictions
This dataset is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Any non-commercial use is permitted. All uses must credit Princeton University and carry this same license.
Status
Complete
Maintenance and Update Frequency
None planned
Point of Contact
Contact Organization
Map and Geospatial Information Center, Lewis Library, Princeton University
City
Princeton
State
NJ
Postal Code
08544
Country
US
Contact Telephone
609-258-1097
Credit
Princeton University Library
Native Data Set Environment
Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362
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
16217
Spatial Reference Information
Horizontal Coordinate System Definition
Geographic
Latitude Resolution
8.983152841195215e-09
Longitude Resolution
8.983152841195215e-09
Geographic Coordinate Units
Decimal Degrees
Geodetic Model
Horizontal Datum Name
D WGS 1984
Ellipsoid Name
WGS 1984
Semi-major Axis
6378137.0
Denominator of Flattening Ratio
298.257223563
Entity and Attribute Information
Entity Type
Entity Type Label
Africa_roads_1970s
Entity Type Definition
Polylines representing road networks, including tracks and railways.
Entity Type Definition Source
Princeton University Library
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
Category
Road category.
All-weather
All-weather road.
Liable to be impracticable in bad weather
Road liable to be impracticable in bad weather.
Major
Major road.
Major rail
Major railroad line.
Motorway
Motorway.
Other
Other road.
Secondary
Secondary road.
Strip road
Strip road.
Under construction
Road under construction.
Definition Source
Princeton University Library
Condition
Surface condition of road, if specified beyond category.
1 lane
1 surface lane.
2 or more lanes
2 or more surface lanes.
Earthen road
Earthen track
Improved
Improved or partially improved
Partially improved
Recognized or marked track
Strip road
Applies to roads with other categories already specified.
Surfaced
Under construction
Applies to roads with other categories already specified.
Unmarked track
Definition Source
Princeton University Library
Obstacles
Hazards or impediments to travel, if applicable.
Difficult or dangerous
Impassable during rainy season
Prohibited
Prohibited road or track.
Definition Source
Princeton University Library
Remarks
Additional pertinent notes on road, if applicable.
Partially improved
Applies to roads with other conditions already specified.
Picturesque route
Under construction
Applies to roads with other categories and conditions already specified.
Definition Source
Princeton University Library
Distribution Information
Name
Metadata Reference Information
Metadata Date
20210820
Metadata Contact
Contact Information
Contact Organization Primary
Contact Organization
Map and Geospatial Information Center, Lewis Library, Princeton University
Contact Address
City
Princeton
State or Province
NJ
Postal Code
08544
Country
US
Contact Voice Telephone
609-258-1097
Metadata Standard Name
FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version
FGDC-STD-001-1998
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