How to use the maup.indexed_geometries.get_geometries function in maup

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github mggg / maup / maup / repair.py View on Github external
def resolve_overlaps(geometries, relative_threshold=0.1):
    """For any pair of overlapping geometries, assigns the overlapping area to the
    geometry that shares the most perimeter with the overlap. Returns the GeoSeries
    of geometries, which will have no overlaps.

    If the ratio of the overlap's area to either of the overlapping geometries'
    areas is greater than `relative_threshold`, then the overlap is ignored.
    The default `relative_threshold` is `0.1`. This default is chosen to include
    tiny overlaps that can be safely auto-fixed while preserving major overlaps
    that might indicate deeper issues and should be handled on a case-by-case
    basis. Set `relative_threshold=None` to resolve all overlaps.
    """
    geometries = get_geometries(geometries)
    inters = adjacencies(geometries, warn_for_islands=False, warn_for_overlaps=False)
    overlaps = inters[inters.area > 0].buffer(0)

    if relative_threshold is not None:
        left_areas, right_areas = split_by_level(geometries.area, overlaps.index)
        under_threshold = ((overlaps.area / left_areas) < relative_threshold) & (
            (overlaps.area / right_areas) < relative_threshold
        )
        overlaps = overlaps[under_threshold]

    if len(overlaps) == 0:
        return geometries

    to_remove = GeoSeries(
        pandas.concat([overlaps.droplevel(1), overlaps.droplevel(0)]), crs=overlaps.crs
    )
github mggg / maup / maup / repair.py View on Github external
def close_gaps(geometries, relative_threshold=0.1):
    """Closes gaps between geometries by assigning the hole to the polygon
    that shares the most perimeter with the hole.

    If the area of the gap is greater than `relative_threshold` times the
    area of the polygon, then the gap is left alone. The default value
    of `relative_threshold` is 0.1. This is intended to preserve intentional
    gaps while closing the tiny gaps that can occur as artifacts of
    geospatial operations. Set `relative_threshold=None` to close all gaps.
    """
    geometries = get_geometries(geometries)
    gaps = holes_of_union(geometries)
    return absorb_by_shared_perimeter(
        gaps, geometries, relative_threshold=relative_threshold
    )
github mggg / maup / maup / repair.py View on Github external
def holes_of_union(geometries):
    """Returns any holes in the union of the given geometries."""
    geometries = get_geometries(geometries)
    if not all(
        isinstance(geometry, (Polygon, MultiPolygon)) for geometry in geometries
    ):
        raise TypeError("all geometries must be Polygons or MultiPolygons")

    union = unary_union(geometries)
    series = holes(union)
    series.crs = geometries.crs
    return series
github mggg / maup / maup / indices.py View on Github external
def get_geometries_with_range_index(geometries):
    gdf = geopandas.GeoDataFrame({"geometry": get_geometries(geometries)}).set_index(
        pandas.RangeIndex(len(geometries))
    )
    return gdf.geometry