About sDNA

sDNA is a hybrid academic, government and commercial project which originated at Cardiff School of Planning & Geography and the Sustainable Places Research Institute.  We have been funded from a mixture of sources including ESRC, BRE, Cardiff University, research agreements with Hong Kong and Tongji Universities and sales of the software to the private sector.

Our aim is to promote the practice of spatial network analysis through

  • Provision of software
  • Provision of training
  • Provision of a knowledge base as a foundation for evidence based decisions and policy

sDNA differs from previous forms of spatial network analysis by

  • standardizing on link-node format (using our continuous space algorithm to ensure accuracy is not lost by doing this)
  • unifying the disciplines of spatial network analysis and transport modelling, learning lessons from both fields
  • prioritizing the testing and validation of outputs against real data

sDNA differs from transport modelling by allowing a wide range of inputs – from no data through to big data – and outputs – from visualisation and decision support tools through to full demand modelling.

sDNA is easy to use with existing map data, and we support numerous workflows:

  • ArcGIS and QGIS for analysts and researchers
  • Autocad for architects and designers
  • Command line interface for scripting
  • Python interface for hackers

For more on the theory behind sDNA, see the following papers

  • Cooper, C. and Chiaradia, A. sDNA: how and why we reinvented Spatial Network Analysis for health, economics and active modes of transport.  In Malleson, N. et al: GIS Research UK (GISRUK) 2015 Proceedings. http://dx.doi.org/10.6084/m9.figshare.1491375
    Background from network analysis perspective including continuous space algorithm

  • Chiaradia, A., Cooper, C., Wedderburn, M. Network geography and accessibility.  Transport Practitioners Meeting, London, 2014.
    Background on why network analysis makes sense for transport modelling

  • Cooper, C. H. V. (2015) Spatial localisation of closeness and betweenness measures: a self-contradictory but useful form of network analysis.  International Journal of GIS
    Tidying up analytical details unaddressed in previous spatial network analysis literature
  • Cooper, C. H. V. (2015) Strategic urban scale models of pedestrian and cycle travel. Presented at Association of European Schools of Planning (AESOP) annual conference, Prague, July 2015.
  • Cooper, C. H. V. & Chiaradia, A. J. (2015) 3d Network Models for prediction of cyclist flows.  Transport Practitioners Meeting, London
  • Wedderburn, M. and Chiaradia, A. J. 2014. Network Network Network: new techniques in pedestrian movement analysis. Presented at: 42nd European Transport Conference, Frankfurt, Germany, 29 Sept-1 Oct 2014.

Examples of work done with sDNA:

Previous presentations

  • Chiaradia, A. J. and Cooper, C. 2014. Health & green infrastructure. Presented at: sDNA WorkshopThe urban design dimensions of planning, Gazi University, Department of City and Regional Planning, Ankara, 10-12 September 2014.
  • Chiaradia, A. J. and Cooper, C. 2014. Economic development (education & entrepreneurship). Presented at: sDNA WorkshopThe urban design dimensions of planning, Gazi University, Department of City and Regional Planning, Ankara, 10-12 September 2014.
  • Chiaradia, A. J. and Cooper, C. 2014. Sustainable transport | Part II (meso-micro) – node and place, link and place. Presented at: sDNA WorkshopThe urban design dimensions of planning, Gazi University, Department of City and Regional Planning, Ankara, 10-12 September 2014.
  • Chiaradia, A. J. and Cooper, C. 2014. Sustainable transport | Part I (macro-meso) – networks. Presented at: sDNA WorkshopThe urban design dimensions of planning, Gazi University, Department of City and Regional Planning, Ankara, 10-12 September 2014.
  • Zhang, L., Chiaradia, A. and Zhuang, Y. 2014. A Configurational Accessibility Study of Road and Metro Network in Shanghai, China. Presented at: The 8th International Association for China Planning (IACP) Conference. Guangzhou, PRC, 21-22 June, 2014
  • Chiaradia, A. J. 2014. Sustainable transport | Part I (macro-meso) – networks. Presented at: The urban design dimensions of planning, Tongji University, Shanghai, PRC, 8 Mai – 5 June 2014.
  • Chiaradia, A. J. 2014. Sustainable transport | Part II (meso-micro) – node and place, link and place. Presented at: The urban design dimensions of planning, Tongji University, Shanghai, PRC, 8 Mai – 5 June 2014.
  • Chiaradia, A. J. 2014. Health & green infrastructure. Presented at: The urban design dimensions of planning, Tongji University, Shanghai, PRC, 8 Mai – 5 June 2014.
  • Chiaradia, A. J. 2014. Economic development (education & entrepreneurship). Presented at: The urban design dimensions of planning, Tongji University, Shanghai, PRC, 8 Mai – 5 June 2014.

The sDNA Logo is actually a spatial network coloured according to one of the sDNA Output Measures.

Can you guess which one?