GIS and CAD tools, training, large scale 3d network analysisCardiff University Sustainable Places Research Institute
sDNA is world leading spatial network analysis software, compatible with both GIS and CAD and using industry standard network representation.  We compute accessibility and predict flows of pedestrians, cyclists, vehicles and public transport users; these inform models of health, community cohesion, land values, town centre vitality, land use, accidents and crime.  We provide a simpler alternative to transport models, particularly for sustainable transport.

Research collaborators
Tongji University College of Architecture and Urban Planning



Recent Posts

Stable release of sDNA version 3: QGIS support and active travel models

We are pleased to announce that sDNA version 3.4.5 is considered stable! While sDNA remains very general purpose software, sDNA3 also includes the latest active travel models from our ongoing research projects. Finally, we have incorporated feedback from our external … Continue reading

Release of Cardiff Cycle Models

To assist with the cycle planning efforts currently underway in Cardiff (Active Travel Integrated Network Map, and the review of Enfys) we are making public our current cycle model outputs.  Cardiff has been sDNA’s primary test case for the development … Continue reading

sDNA at Wales Planning Conference 2016

In partnership with Sustrans, Crispin will be delivering two workshops on active travel planning next week at the RTPI Cymru Wales Planning Conference 2016. Under the Active Travel Act, Welsh Local Authorities are required to produce Integrated Network Maps detailing … Continue reading

Ecological Footprinting: transport scenarios for the Hay Festival

sDNA was used behind the scenes to estimate ecological footprints for numerous Hay Festival alternative transport scenarios.  We found that ecological impacts could be cut most by reducing international air travel and replacing private car journeys with appropriately structured bus … Continue reading

sDNA partners offering pedestrian and cycle modelling

A quick nod to our private and third sector partners, who you can approach to commission pedestrian and cycle models with sDNA. That’s if you don’t want to download our software and do the job yourself of course! In alphabetical … Continue reading

Announcing the sDNA 3 public beta: more compatibility (including QGIS), easier to use, more sophisticated analysis

I’m excited to present sDNA version 3 for public beta testing.  sDNA 3 is based on feeback from our research partners Arup, WSP, Sustrans and Tongji University, and adds an enormous amount of new functionality both for free and paying … Continue reading

Promoting Active Travel at the Welsh Assembly

The sDNA team – partnered up with Sustrans – were invited into the Welsh Assembly by AM Jenny Rathbone on Tuesday. Together we are keen to ensure that the Welsh Government follows through on its commitment to Active Travel set … Continue reading

Repairing split links is no longer necessary

In the soon-to-be-released sDNA3, it will no longer necessary to repair split links.  This looks like a departure from how sDNA used to work, so I’d better explain it. First, let’s clarify what we’re talking about.  A split link is … Continue reading

Network analysis for big data

Crispin gave an invited talk at Association for Geographic Information’s “GeoBig5: Big Data and You” conference on the links between spatial network analysis and big data. To summarize, Spatial network analysis leverages existing large datasets by extracting novel information from … Continue reading

Strategic urban scale models of pedestrian and cycle travel (Aesop 2015)

Crispin will be presenting sDNA models of pedestrian and cyclist travel at the Association of European Schools of Planning Conference, Prague, 14th July 2015.  As ever, get in touch if you would like to meet up.