Floodline map

Floodline Code and method

Where responders are needed in a flood, per hexagon.

This map

Priority per hexagon

lowhigh

Opacity shows confidence. A dark outline marks a hexagon whose roads are cut off by the flood.

Layers

Priority hexagons Mapped flood extent (satellite) Roads under water (closed) Fire stations hospitals Geotagged photos

Highest priority

Selected hexagon

Click a hexagon or a photo.

How it is scored

Hazard: share of the hexagon inside the satellite flood polygons, or photo depth when a photo has been assessed.

Exposure: OpenStreetMap buildings inside the flood, plus every building in a hexagon the flood cuts off.

Access: travel time from the nearest fire station or hospital, with every road that runs at least 15 m through the flood removed.

Priority is zero unless a hexagon is wet or cut off. Photos add confidence, not priority, until they are assessed.

Sources

Flood extent: Copernicus Emergency Management Service rapid mapping, , © European Union. Roads, buildings, stations: © OpenStreetMap contributors (ODbL), current map. Photos: Wikimedia Commons via the European Flood 2013 dataset (Barz et al., 2018), each under its own licence. Hexagons: H3.