1
Add Data
Paste a COG URL or drop a local .tif anywhere.
or try:
Opened from a link.
2
Select & Fetch
Draw a box on the area you want, then fetch the data.
No region selected
3
Analyze
Run statistics on the fetched data.
Pixel Value (hover)
Hover over rendered area
Copy as Python
Paste into a Jupyter cell. Reproduces the same overview level + window the viewer used.
1
Simulation Grid
Resample the selected region onto a grid with square cells.
No grid built
2
Terrain
Hillshade, slope and aspect from the elevation grid.
315°
45°
1×
3
Hydrology
Fill depressions, route flow downhill, extract the channel network.
—
4
Catchment & Flood
Click a point on a channel and everything draining to it is outlined.
Flooding works with or without one — a catchment just lets you limit it.
5.0 m
Drag Stage to flood, or pick an outlet first.
100%
85%
Flood is a HAND approximation: it assumes the water surface parallels the
channel network. It says nothing about timing, velocity, or whether a
levee holds — for that you need a hydraulic model.
Computed on a resampled overview grid, not full resolution.
Depressions are filled, so real closed basins are routed through.
D8 sends all flow to one neighbour and cannot express divergence.
NoData cells act as walls. Good for exploring; not a hydraulic model.