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