Spatial Design Network Analysis (sDNA) is a methodology and an evidence base accompanied by a suite of industry standard free software tools. Spatial networks are the fundamental substrate on which all human interaction takes place. Use sDNA to start measuring the network in your design.


sDNA is a standard method for analysing spatial networks. sDNA measures are known to correlate to human health, land values, town centre vitality, pedestrian flows, land use, traffic volumes, accidents and crime.
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The sDNA software currently supports Autocad for architect and urban designer use, and all GIS packages for research and analyst use (with standalone shapefile processing, plus dedicated plugins for ESRI/Arc). Use sDNA free of charge -
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Read The Friendly Guide to sDNA Outputs for an overview of what our software measures. That's the semi-technical version - for full gory details see our documentation section. We even have a Python API now!

Knowledge Base

We are building a knowledge base of research relating to sDNA for use in evidence based policy making. sDNA is supported by 20 years of research, but addresses the weaknesses of existing tools to provide a robust, repeatable methodology.
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