Digital Street Data

摘要

Strong demand in recent years for freely available spatial data has boosted the availability of Volunteered Geographic Information (VGI) on the internet. The use of VGI in large-scale projects such as trip planners means an increasing need for quality assessment. While commercial data providers selling digital street maps provide a certain level of quality assurance there are no quality regulatory measures incorporated in VGI portals. The authors compare the completeness of freely available and proprietary street-network data for the state of Florida, and selected cities in the US and Germany.