mtcontrib/mapgen_rivers
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Added description of the algorithm + acknowledge the authors of the paper.

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Gael-de-Sailly 2020-12-05 14:33:40 +01:00
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terrainlib/rivermapper.py
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@ -2,6 +2,16 @@ import numpy as np
import numpy.random as npr
from collections import defaultdict
# This file provide functions to construct the river tree from an elevation model.
# Based on a research paper:
# | Cordonnier, G., Bovy, B., and Braun, J.:
# | A versatile, linear complexity algorithm for flow routing in topographies with depressions,
# | Earth Surf. Dynam., 7, 549–562, https://doi.org/10.5194/esurf-7-549-2019, 2019.
# Big thanks to them for releasing this paper under a free license ! :)
# The algorithm here makes use of most of the paper's concepts, including the Planar Boruvka algorithm.
# Only flow_local and accumulate_flow are custom algorithms.
def flow_local(plist):
"""
Determines a flow direction based on denivellation for every neighbouring node.