• Digital Spatial data: Problems of Property, Access, Pricing and Quality 

      Wigan, Marcus
      Published 1994-01-01
      Spatial information data has become widely available in a variety of digital forms, and is of great interest to users and potential of Geographical Information Systems. Most of the data has come from the work in the ...
      Open Access
      Working Paper
    • Measurement and evaluation of non-motorised transport 

      Wigan, Marcus
      Published 1994-10-01
      Walking and cycling are travel modes where the operating cost is close to zero, and little or direct revenues flow from their usage. This makes the evaluation of their contribution to transport more difficult than for the ...
      Open Access
      Working Paper
    • Walking as a Transport Mode 

      Wigan, Marcus
      Published 1994-04-01
      Walking is viewed from many different perspectives, but lacks both informed advocacy groups and a unified policy treatment. As a result, the weight given to pedestrian movements is inconsistent, and an appropriate view ...
      Open Access
      Working Paper