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Results tagged with flood
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user 25521
A flood is an overflow of water that submerges land which is usually dry. Within GIS we often want to model a flood with terrain models.
2
votes
map flood inundation risk QGIS
areas
F = D * W # F is the DEM with dry land masked out (starting flood positions)
while True:
changed = False
for c in F: # for every cell index in raster
if F[c]: # flood from the cells … that are already flooded
# flood all eligible neighbouring pixels
# needs defined neighbourhood (4/8 cells around)
for n in neighbours(c):
# flood all dry pixels within tolerance …
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