sDNA+

The free, standard sDNA provides some of the best network analysis tools available, used in numerous pieces of research and consultancy worldwide.

For professional users, sDNA+ gives you access to our most up-to-date, most flexible, best tested models. Working alongside our public, private and third sector partners, we also figured out numerous workflow enhancements to save you time.

  • Modelling pedestrians, cyclists, public transport or vehicles? Just select our best behaviour models from the menu
  • Modelling something else? Use the same flexible system to develop models for your own needs
  • Need a quick workflow? Better preparation tools and quick scenario tools await
  • Integrate with other models? Matrix import/export allows you to replace components of external models with high resolution sDNA
  • Better visualisation? Now with even more outputs including full 3d geometry and flow bundles

A 7 day evaluation of sDNA+ is available free of charge, once per team, no commercial use.  To request evaluation, view prices and purchase, see sDNA+ Pricing.

For the technically minded, an in-depth comparison of features can be found below.

Current feature comparison sDNA sDNA+
Full user manual
…not as hard to understand as this list of features…
Tested in the real world
following extensive work with our private and third sector partners
Machine Learning
fit models to data with bayesian, entropy maximisation, multicollinearity-tolerant algorithms
Generalized Cross-Validation
test predictive ability without losing data for calibration
GEH support
run analysis to minimize geh for transport applications
Multi scale analysis
euclidean network radii
Euclidean shortest paths
Angular shortest paths
Custom shortest paths
3d shortest paths
taking account of height change in route choice
Random perturbations to shortest paths
modelling uncertainty and diversity in route choice
Hybrid shortest paths
combining all the above based on user formula
Angular, custom, 3d, random, hybrid radius
allows mode choice based on accessibility
Preset metrics
easily model pedestrian, cyclist, vehicle, public transport behaviour
One way shortest paths and radius
respecting one way systems, escalators etc
Scenario analysis
enable/disable links without editing the network
Turn metrics can refer to link data
apply turn penalties in specific situations
Banded radius
for better multivariate modelling
Advanced geodesic analysis and handling
for conflicts between euclidean radius and angular/other geodesics
Output destination shapes and data
distance maps, isochrones, isokampters etc
Output geodesic shapes and data
profile population exposure along travel routes, users of given links etc
Output flow bundles
geodesics or flow maps for users of specific links
Output network buffer shapes and data
accessibility analysis
Output convex hull shapes and data
accessibility analysis
Selective origin processing
for detailed analysis of selected locations
Link centre type overrides
Grade separation and elevation support
(you don’t need to know how high the bridges are)
Link weighting
now done without having to alter the network
Length Weighting
some people like this too
Custom weighting
based on user data per link, polyline or unit length
Separate origin/destination weighting
when you know where people are going
OD matrix import
when you already know who is going where
Skim matrix export
when you want to predict who is going where
Network preparation tool
removing split links, duplicates, cluster tolerance problems, traffic islands and isolated systems
Network preparation tool preserves numeric data
either absolute or per unit length
Mean distance accessibility measures
for each geodesic type
Gravity model type accessibility measures
network quantity penalized by distance
Customizable gravity model measures
as above with user parameters
Betweenness measures
predictions of flow
Two step floating catchment
modified betweenness and quantity measures
Raw quantity measures
links, length, weight, angularity, geodesic lengths
Junction measures
junctions and connectivity
Severence measures
diversion ratios
Efficiency measures
based on convex hull geometry
Individual link measures
angularity, sinuosity, bearing, length, connectivity
ArcGIS plugin
arcgis 10.1 onwards
Basic Autocad plugin
for all products in the autocad family including map3d
Advanced Autocad workflow
for advanced features we recommend exporting from map3d to shapefile and using qgis
QGIS Plugin
qgis 2.8 onwards
ArcGIS match symbology tool
useful for displaying multiple networks on the same scale
Autocad convert from link-unlink format
useful for preparing hand-designed networks
Workflows for advanced network preparation
see the user manual for how to do this with the free qgis
Command line interface
for scripting large sets of analyses
Python programming interface
for complex analysis and parametric design
Multi core, multi CPU support
for faster analyses
Subsampling
allowing to trade off accuracy for increased speed
Large scale networks
using a 64 bit platform to process over 500,000 links