Sea Level Rise lets you simulate how rising water levels would affect terrain in your project. Drag a slider between 0 and 100 metres to see areas below that elevation flooded with water in real time on the map.
Open the tool
Open the right-hand panel, switch to the Tools tab, and select Sea Level Rise. The tool automatically enables 3D mode and overlays a global terrain raster on the map.
Using the tool
Move the Sea level rise slider to set how much the sea rises, displayed in your workspace unit (metres or feet). The water layer redraws immediately, colouring everything below the chosen elevation in dark blue.
The slider uses a square-root scale so small rises (under 5 m) are easier to fine-tune than larger ones — most coastal-flood scenarios live at the low end.
Limits and notes
- The simulation fills areas below a given height with water based on terrain data only. It does not model levees, dams, sediment accumulation, or other flood defences.
- This is a visualisation tool, not a hazard map. For real flood risk, refer to hazard maps published by local authorities.
- Closing the panel removes the terrain overlay and restores normal map rendering.
- The tool requires 3D mode; closing it automatically turns 3D back off.