Accessibility_Travel_time_to_Major_Cities (Map Service)
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Current Version: 10.81
Service Description: Accessibility is defined as the travel time to a location of interest using land (road/off road) or water (navigable river, lake and ocean) based travel. This accessibility is computed using a cost-distance algorithm which computes the “cost” of traveling between two locations on a regular raster grid. Generally this cost is measured in units of time.
The input GIS data and a description of the underlying model that were developed by Andrew Nelson in the GEM (Global Environment Monitoring) unit in collaboration with the World Bank’s Development Research Group between October 2007 and May 2008. The pixel values representing minutes of travel time. Available dataset: Joint Research Centre - Land Resource Management Unit
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Description: Accessibility is defined as the travel time to a location of interest using land (road/off road) or water (navigable river, lake and ocean) based travel. This accessibility is computed using a cost-distance algorithm which computes the “cost” of traveling between two locations on a regular raster grid. Generally this cost is measured in units of time.
The input GIS data and a description of the underlying model that were developed by Andrew Nelson in the GEM (Global Environment Monitoring) unit in collaboration with the World Bank’s Development Research Group between October 2007 and May 2008. The pixel values representing minutes of travel time. Available dataset: Joint Research Centre - Land Resource Management Unit
Copyright Text: Andy Nelson - GEM Unit, WB-WDR 2008
Spatial Reference:
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Document Info:
- Title: Accessibility Travel Time to Major Cities
- Author: e.barona_CIAT
- Comments:
- Subject: Travel time in minutes, hours and days to the nearest city of 50,000 or more people (year 2000). Modes of travel are land and water based. The data resolution is 30 arc seconds.
- Category:
- Keywords: accessibility, travel time, connectivity, concentration economic