59 lines
1.8 KiB
Python
59 lines
1.8 KiB
Python
from __future__ import annotations
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from typing import Any
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from pyproj import Transformer
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from shapely.geometry import GeometryCollection, MultiPolygon, Polygon, box, shape
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from shapely.ops import transform
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from shapely.validation import make_valid
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def normalize_to_multipolygon(raw_geometry: dict[str, Any]) -> MultiPolygon:
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geom = shape(raw_geometry)
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if geom.is_empty:
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raise ValueError("Geometry is empty")
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if not geom.is_valid:
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geom = make_valid(geom)
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if not geom.is_valid:
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raise ValueError("Geometry is invalid and could not be repaired")
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if geom.geom_type == "Polygon":
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return MultiPolygon([geom])
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if geom.geom_type == "MultiPolygon":
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return MultiPolygon(geom.geoms)
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if isinstance(geom, GeometryCollection):
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polygons = [g for g in geom.geoms if isinstance(g, Polygon)]
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multipolygons = [g for g in geom.geoms if g.geom_type == "MultiPolygon"]
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if not polygons and not multipolygons:
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raise ValueError("Only polygon geometries are supported for AOI")
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normalized = []
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normalized.extend(polygons)
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for mp in multipolygons:
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normalized.extend(mp.geoms)
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return MultiPolygon(normalized)
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raise ValueError("Only Polygon or MultiPolygon geometries are accepted")
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def area_bounds_multipolygon(geom: MultiPolygon):
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return {
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"min_x": float(geom.bounds[0]),
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"min_y": float(geom.bounds[1]),
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"max_x": float(geom.bounds[2]),
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"max_y": float(geom.bounds[3]),
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}
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def area_m2(geom: MultiPolygon) -> float:
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projected = transform(
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Transformer.from_crs("EPSG:4326", "EPSG:31370", always_xy=True).transform,
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geom,
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)
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return float(projected.area)
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def geometry_bbox_polygon(geom: MultiPolygon):
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return box(*geom.bounds)
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