Faster raster to vector

[jordancaraballo]

def tiff_to_vector(tiff_path, output, simplify_tolerance=None, **kwargs):
    """Convert a tiff file to a gpkg file.
    Args:
        tiff_path (str): The path to the tiff file.
        output (str): The path to the vector file.
        simplify_tolerance (float, optional): The maximum allowed geometry displacement.
            The higher this value, the smaller the number of vertices in the resulting geometry.
    """

    with rasterio.open(tiff_path) as src:
        band = src.read()

        mask = band != 0
        shapes = features.shapes(band, mask=mask, transform=src.transform)

    fc = [
        {"geometry": shapely.geometry.shape(shape), "properties": {"value": value}}
        for shape, value in shapes
    ]
    if simplify_tolerance is not None:
        for i in fc:
            i["geometry"] = i["geometry"].simplify(tolerance=simplify_tolerance)

    gdf = gpd.GeoDataFrame.from_features(fc)
    if src.crs is not None:
        gdf.set_crs(crs=src.crs, inplace=True)
    gdf.to_file(output, **kwargs)