Choose the geographic view
Points help inspect individual locations, clusters reveal concentration, and the heatmap exposes broader patterns without changing the underlying task.
Soteria
Road-safety analytics GIS tool
A road-safety GIS workspace for examining accidents and hotspots in Madrid and Athens.
GISRoad safetyData visualisationFrontend
The project
The work behind the interface
Road-safety analysis needs both a view of the whole area and a way to inspect one location. I designed and implemented Angular views that connect Leaflet maps, Chart.js charts, filters and accident records. In the hotspot view, analysts can narrow the data by road-user type, severity, date and segment or intersection, then switch between points, clusters and a heatmap. Selecting a hotspot highlights its location and opens a table of related accidents, keeping the detail connected to the map.
Design details
Three parts of the work
Filter before inspecting
Road-user type, severity, date range and segment/intersection controls let analysts narrow the map and its charts to a relevant slice of accident data.
Follow a hotspot to its records
A selected hotspot stays highlighted while a linked table exposes its associated accidents. The project also includes separate accident and travel-demand views.
In the interface