Run2 geojson handling
Advanced handling of GeoJSON files in GeoPandas, emphasizing correct geometry formats and time processing to ISO 8601 standard.From its SKILL.md
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SKILL.md
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GeoJSON and Time Formatting
GeoPandas natively reads GeoJSON files into a GeoDataFrame.
Properties like Unix timestamps in JSON are often stored in milliseconds, and must be correctly formatted to ISO 8601 string representations (e.g. YYYY-MM-DDTHH:MM:SSZ) for external consistency.
Usage
import geopandas as gpd
from datetime import datetime, timezone
# Load points
gdf = gpd.read_file('features.json')
# Attributes are Pandas columns
print(gdf['mag'].max())
# Spatial properties
lon = gdf.geometry.x
lat = gdf.geometry.y
# Format Time to ISO 8601 (without fractional seconds)
def format_iso_time(ms_timestamp):
dt = datetime.fromtimestamp(ms_timestamp / 1000.0, tz=timezone.utc)
return dt.strftime("%Y-%m-%dT%H:%M:%SZ")
print(format_iso_time(1735537742808))
# Outputs: '2024-12-30T04:02:22Z'
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