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cleaning.py
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import math
import pandas as pd
ELEVATION_MIN = -500
ELEVATION_MAX = 9000
ELEVATION_SEPERATION = 50
def tidy_data(
row: pd.Series,
elevation_max=ELEVATION_MAX,
elevation_min=ELEVATION_MIN,
elevation_seperation=ELEVATION_SEPERATION
) -> pd.Series:
"""Tidy up the data as per Daniele Busana et al"""
# Lower elevation higher than upper elevation
if not pd.isna(row.elevation_lower) and not pd.isna(row.elevation_upper):
if row.elevation_lower > row.elevation_upper:
row.elevation_lower = elevation_min
row.elevation_upper = elevation_max
# Missing lower and/or upper elevation
if pd.isna(row.elevation_lower):
row.elevation_lower = elevation_min
if not pd.isna(row.elevation_upper) and row.elevation_upper < elevation_min:
row.elevation_upper = elevation_max
if pd.isna(row.elevation_upper):
row.elevation_upper = elevation_max
if row.elevation_lower > elevation_max:
row.elevation_lower = elevation_min
# Lower elevation < -500 and/or upper elevation > 9000
row.elevation_lower = max(elevation_min, row.elevation_lower)
row.elevation_upper = min(elevation_max, row.elevation_upper)
# Small difference (<50m) between lower and upper elevation
elevation_diff = row.elevation_upper - row.elevation_lower
if elevation_diff < elevation_seperation:
spare = elevation_seperation - elevation_diff
adjust = math.ceil(spare / 2)
row.elevation_lower -= adjust
row.elevation_upper += adjust
if row.elevation_lower < elevation_min:
adjust = elevation_min - row.elevation_lower
row.elevation_lower += adjust
row.elevation_upper += adjust
elif row.elevation_upper > elevation_max:
adjust = row.elevation_upper - elevation_max
row.elevation_lower -= adjust
row.elevation_upper -= adjust
return row