Flood and sea level map
Raise the water level and see which ground lies below it: the coast after a sea level rise, a river valley in a flood, a lake if its level rises. The shading follows the elevation of the ground, from our own terrain data.
Not a flood insurance map: every spot below the level is shaded, whether water could reach it or not. In the US, official flood zones are on FEMA's Flood Map Service Center.
Terrain: ~30 m global elevation data on our own server.
Flood and Sea Level Map
Raise the water level and see which ground lies below it: the coast after a sea level rise, a river valley in a flood, a lake if its level rises. The shading follows the elevation of the ground, from our own terrain data.
Is this an official flood map?
No. It shades the ground below a level you choose, from ~30 m terrain models. It does not model rivers, levees, drainage, tides or storm surge, and it is not a flood insurance map. In the United States, the official flood zones are on FEMA's Flood Map Service Center.
How do I see sea level rise?
At 0 the shading is the sea. Raise the level to see which land a rise of 1, 2 or 5 m would reach (the coast shades first). The area below the level is shown in square kilometers and miles.
Why is some inland ground shaded?
The shading is a 'bathtub' model: every spot below the level is shaded, even where water could not reach it. Read low inland areas as places to look at, not places that will flood.
Where does the elevation come from?
Elevations come from our own copy of global ~30 m terrain models (the Mapzen terrain mosaic of SRTM, USGS NED, EU-DEM and others, with ocean depths), served from our own server.
Is there an app?
Not for this tool yet. The nearest is Geo Elevation, on iPhone, iPad and Mac, which draws the elevation profile of a path, with the chart tied to the map, and saves it as a document. Paid. App Store · Mac App Store